Citation Style Guide by Academic Discipline: Which Style to Use

Citation style varies dramatically by academic discipline. Understanding which style your field uses is fundamental to academic success. This guide maps citation styles to disciplines and explains why different fields prefer different approaches.

The Major Citation Styles at a Glance

Style	Disciplines	Key Features	In-Text Citation
APA	Social sciences, psychology, education, business	Author-Date format, emphasis on publication year	(Author, Year)
MLA	Literature, languages, humanities	Author-Page format, Works Cited list	(Author Page)
Chicago	History, some humanities, journalism	Two systems: Notes-Bibliography or Author-Date	Footnotes/endnotes or (Author, Year)
Harvard	UK institutions, some social sciences	Author-Date format, similar to APA	(Author Year)
Vancouver	Medicine, health sciences, biology	Numbered citations	[1]
IEEE	Engineering, computer science	Numbered citations, technical standards	[1]
OSCOLA	Law	Footnote-based, modified author-title	Footnotes
Bluebook	Law (US), legal citations	Footnote-based, detailed source information	Footnotes
ACS	Chemistry	Numbered citations with specific chemistry conventions	[1]

Part 1: Humanities Disciplines

Literature and Languages (MLA or Chicago)

Primary Style: MLA (Modern Language Association)

Literature, languages, and English studies predominantly use MLA, the modern standard for humanities.

Why MLA for literature:

• Emphasizes textual evidence and quotation
• Page numbers crucial for citing specific passages
• In-text citations connect readers directly to Works Cited
• Designed for humanities scholarship focusing on interpretation

MLA characteristics:

• In-text: (Author Page) format
• Works Cited: Alphabetical list at paper’s end
• Title capitalization: Title Case
• Quotation marks: Double quotes for articles, italics for books
• Emphasis on author and page number for precise sourcing

Example MLA citation:

• Book: Smith, John. The Evolution of Modern Literature. Academic Press, 2024.
• Journal article: Johnson, Mary. “Digital Narratives in Contemporary Fiction.” Literary Studies Quarterly, vol. 45, no. 3, 2024, pp. 234-256.
• In-text: (Smith 45) or (Johnson 312)

See our MLA guide for comprehensive formatting.

Alternative: Chicago Notes-Bibliography

Some humanities disciplines (particularly history) alternatively use Chicago’s Notes-Bibliography system:

• Uses footnotes or endnotes for citations
• Bibliography at end lists all sources
• Allows more detailed notes than simple citations
• Preferred in history and some humanities fields

See our Chicago guide.

Philosophy

Primary Style: Chicago (Notes-Bibliography) or Discipline-Specific Format

Philosophy varies by tradition:

• Analytic philosophy sometimes uses APA or Harvard
• Continental and historical philosophy often use Chicago Notes-Bibliography
• Classics and ancient philosophy use Chicago

Check your institution’s philosophy department guidelines.

History

Primary Style: Chicago (Notes-Bibliography)

History departments almost universally prefer Chicago Notes-Bibliography because:

• Allows detailed contextual notes beyond simple citations
• Accommodates primary sources with complex provenance information
• Notes-Bibliography tradition aligns with historical scholarship
• Enables endnote discussions alongside citations

Chicago characteristics for historians:

• Footnotes or endnotes for citations and supplementary information
• Bibliography listing all sources
• Flexible format accommodating various source types
• Detailed publication information for historical accuracy

See our Chicago guide.

Art History and Visual Studies

Primary Style: Chicago or MLA

Art history typically uses Chicago or MLA:

• Chicago dominates in most departments
• Some institutions prefer MLA
• Visual image citations require special handling
• Check departmental requirements

Part 2: Social Sciences

Psychology, Behavioral Sciences, Education

Primary Style: APA (American Psychological Association)

Psychology, education, and behavioral sciences overwhelmingly use APA because:

• Emphasizes publication year (important for research currency)
• Designed for empirical research reporting
• Standard across psychology journals and publications
• Clear, systematic format for research documentation

APA characteristics:

• In-text: (Author, Year) format
• References: Alphabetical list at paper’s end
• Emphasis on author, year, publication date
• Title capitalization: Sentence case for articles/books
• Designed for empirical, research-based writing

Example APA citation:

• Book: Smith, J. (2024). The evolution of modern literature. Academic Press.
• Journal article: Johnson, M. (2024). Digital narratives in contemporary fiction. Literary Studies Quarterly, 45(3), 234–256.
• In-text: (Smith, 2024) or Smith (2024)

See our APA guide.

Sociology, Anthropology, Political Science

Primary Style: APA

Most social science disciplines follow APA conventions for consistency:

• Sociology, anthropology, political science all use APA
• Some international institutions use Harvard
• APA standard across major journals in these fields
• Facilitates cross-disciplinary communication

Business and Economics

Primary Style: APA or Chicago

Business schools split between:

• APA: Most common in US business schools, especially for empirical research
• Chicago: Some business history and certain specializations
• Harvard: Some international business programs

Check your institution’s business school style guide.

Communications and Journalism

Primary Style: APA or Chicago

Communications departments vary:

• APA: More common in research-focused programs
• Chicago: Preferred in journalism and media studies specializations
• AP Stylebook: Some journalism programs prefer AP style

Check your program’s requirements.

Part 3: Natural Sciences

Biology, Biochemistry, Life Sciences

Primary Style: Vancouver or APA

Life sciences use two approaches:

• Vancouver: Dominates medical and health-related research
• APA: Some biology departments and environmental sciences

Why Vancouver for medical sciences:

• Numbered citations track citation order (important in medical research)
• Precise publication information for research verification
• International standard in medical literature
• Efficient for papers with many citations

Vancouver characteristics:

• Numbered citations: [1], [2], [3] in citation order
• References: Numbered list in citation order
• Emphasis on precise publication information
• Abbreviations for journal names

Example Vancouver citation: Journal article: 1. Johnson M, Smith J. Digital health interventions in primary care. Medical Research Review. 2024;45(3):234–256.

See our Vancouver guide.

Chemistry

Primary Style: ACS (American Chemical Society)

Chemistry uses ACS style:

• Why ACS: Designed specifically for chemistry research
• Numbered citations, chemistry-specific abbreviations
• Emphasizes chemical nomenclature and formulas
• Standard across chemistry journals

ACS characteristics:

• Numbered citations in parentheses: (1)
• References: Numbered list in citation order
• Specific abbreviations for common chemistry journals
• Chemical formula formatting requirements

See our chemistry citation guide for chemical research basics.

Physics and Astronomy

Primary Style: IEEE or AIP (American Institute of Physics)

Physics uses numbered citation systems:

• IEEE: Engineering and some physics fields
• AIP: Theoretical physics and astronomy
• Similar to Vancouver but with physics-specific conventions

Why numbered systems: Track citation order in highly technical fields with many citations.

Environmental Science and Ecology

Primary Style: Vancouver or APA

Environmental science splits between:

• Vancouver: For ecological research with heavy citation loads
• APA: For environmental policy and social aspects

Check your institution’s environmental science program.

Part 4: Engineering and Technology

Engineering Fields (Civil, Mechanical, Electrical, Chemical)

Primary Style: IEEE (Institute of Electrical and Electronics Engineers)

Engineering overwhelmingly uses IEEE because:

• Designed for technical documentation: Accommodates technical specifications and standards
• Numbered citations: Efficient for papers with hundreds of references
• International standard: IEEE citations recognized globally in engineering
• Precise formatting: Accommodates patents, standards, technical reports

IEEE characteristics:

• Numbered citations in brackets: [1], [2], [3]
• References: Numbered list in citation order
• Abbreviations for technical journals and conferences
• Specific formatting for technical standards and patents

Example IEEE citation: [1] J. Smith, M. Johnson, and K. Lee, “Digital system design principles,” IEEE Transactions on Engineering, vol. 45, no. 3, pp. 234–256, Mar. 2024.

See our IEEE guide.

Computer Science and Information Technology

Primary Style: IEEE or ACM

Computer science typically uses:

• IEEE: More common in general CS programs
• ACM: Association for Computing Machinery standard, common in software engineering and CS research

Both are numbered systems similar to IEEE.

Architecture

Primary Style: Chicago or Discipline-Specific

Architecture may use:

• Chicago (common)
• MLA (some programs)
• Institution-specific guidelines (check architecture program)

Consult your program’s requirements.

Part 5: Health and Medical Sciences

Medicine, Nursing, Public Health

Primary Style: Vancouver

Medical sciences universally use Vancouver because:

• Designed for medical research: Accommodates complex medical terminology and research designs
• International standard: WHO and major medical journals use Vancouver
• Numbered citations: Efficient for heavily-cited medical research
• Precise publication info: Critical for medical literature verification

Vancouver characteristics:

• Numbered citations in brackets: [1], [2], [3]
• References: Numbered in citation order
• Journal name abbreviations per MEDLINE standards
• Specific format for clinical trials and medical reports

See our Vancouver guide.

Psychology (Clinical, Counseling, Health Psychology)

Primary Style: APA

Clinical psychology uses APA:

• Standard across psychology journals
• Emphasizes author and year
• Accommodates diverse source types (clinical case studies, empirical research)

See our APA guide.

Pharmacy and Pharmacology

Primary Style: Vancouver or ASHP (American Society of Health-System Pharmacists)

Pharmacy uses:

• Vancouver: Most common, parallel to medical literature
• ASHP: Specific pharmaceutical standards

Part 6: Law

Law (US)

Primary Style: Bluebook

US law uses Bluebook citation because:

• Legal standard: Universally recognized in legal profession
• Detailed footnoting: Accommodates complex legal citations
• Precise source identification: Critical for legal research
• Hierarchical authorities: Distinguishes primary from secondary sources

Bluebook characteristics:

• Footnote-based citations
• Complex rules for cases, statutes, regulations
• Large and Small capitals for certain terms
• Specific formatting for legal authorities

Bluebook is complex; consult the official manual for detailed guidance.

Law (UK and Commonwealth)

Primary Style: OSCOLA (Oxford Standard for Citation of Legal Authorities)

UK and Commonwealth legal systems use OSCOLA:

• Commonwealth standard: Used in UK, Australia, Canada, etc.
• Footnote-based: Similar to Bluebook but simpler
• Author-based: Emphasizes author more than Bluebook

Part 7: Social Work and Human Services

Primary Style: APA

Social work and human services use APA:

• Standard across social work journals
• Emphasizes research and evidence-based practice
• Accommodates diverse source types

See our APA guide.

Part 8: Fine Arts, Music, and Performing Arts

Music

Primary Style: Chicago or MLA

Music programs vary:

• Chicago: More common, accommodates complex musicological citations
• MLA: Some programs, especially music education

Music-specific citations: Musical scores and recordings require special formatting.

Visual Arts and Design

Primary Style: Chicago or MLA

Visual arts programs vary:

• Chicago: Common in art history
• MLA: Some programs, especially contemporary art
• Special formatting: Images and visual materials require specific handling

Theater and Film Studies

Primary Style: MLA or Chicago

Theater and film studies typically use:

• MLA: Increasingly common
• Chicago: Traditional approach in some departments

Special formatting: Film, video, and performance citations require specific conventions.

Part 9: Business and Management

Primary Style: APA

Business research overwhelmingly uses APA:

• Standard for business journals
• Emphasizes research currency (year important)
• Dominates MBA and business graduate programs

Some specializations may use Chicago or Harvard. Check your institution.

Part 10: Education

Primary Style: APA

Education departments use APA:

• Standard across education research
• Emphasizes research design and methodology
• Compatible with social science standards

See our APA guide.

Part 11: Theology and Religious Studies

Primary Style: Chicago or SBTS (Southern Baptist Theological Seminary) Style

Theology programs vary:

• Chicago: Most common, especially Notes-Bibliography
• SBTS: Specific theological standard
• Some programs: Institutional styles

Consult your theology program’s requirements.

Part 12: Interdisciplinary and Emerging Fields

Environmental Studies

Primary Style: Varies by institution

Environmental studies draws from multiple disciplines:

• Scientific focus: Uses Vancouver or APA
• Humanities focus: Uses Chicago or MLA
• Check your program’s requirements

Global Studies and International Relations

Primary Style: Chicago or APA

Interdisciplinary programs typically use:

• Chicago: Historical and area studies focus
• APA: Research-heavy programs

Data Science and Computational Research

Primary Style: IEEE or APA

Computational fields use:

• IEEE: Engineering-focused programs
• APA: Research-focused programs

When Your Field Uses Multiple Styles

Some disciplines accept multiple citation styles. If no specific requirement applies:

1. Check your institution’s guidelines Your institution’s graduate handbook or style guide may specify preferred styles.

2. Check your program’s requirements Different departments within universities sometimes use different styles.

3. Ask your advisor Your thesis advisor can clarify if guidelines aren’t explicit.

4. Check journal requirements If submitting to a journal, follow its style requirements.

5. Choose consistently If truly optional, choose one style and use it consistently throughout your paper.

Choosing Between Similar Styles

APA vs. Harvard

Both are author-date systems with minor differences:

• APA: Dominates in US social sciences
• Harvard: Common in UK institutions
• Check your institution’s requirements
• See our APA vs Harvard comparison

Chicago vs. MLA

Both are standard in humanities but serve different purposes:

• Chicago Notes-Bibliography: Better for historical scholarship with extensive notes
• MLA: Better for literary analysis with page-specific citations
• See our Chicago vs MLA comparison

Vancouver vs. APA

Both work in medical/biological sciences:

• Vancouver: Standard in medical literature
• APA: Increasingly common in health sciences
• Check your specific program

Cross-Disciplinary Research

If writing for multiple disciplines:

1. Follow primary discipline’s style Your primary field’s conventions take precedence.

2. Use the field of your institution If at a medical school writing social science research, follow medical conventions.

3. Clarify with your audience Ask your advisor or committee which style they prefer.

4. Acknowledge if required to switch If required to use a non-standard style for your field, clarify this with your institution.

Citation Generator Tools

Most citation styles have automated generators:

APA generators:

• Zotero (free)
• Mendeley (free and paid)
• EasyBib
• Citationsy

MLA generators:

• Zotero
• Mendeley
• EasyBib
• CitationMachine

Chicago generators:

• Zotero
• Mendeley
• EasyBib

Harvard generators:

• Mendeley
• Zotero

IEEE, Vancouver, ACS generators:

• Mendeley
• Zotero

Note: Use generators as starting points only. Verify formatting against official guidelines, as generators sometimes contain errors.

Related Citation Guides

Explore our comprehensive citation guides:

• When to Use Which Citation Style
• APA 7th Edition Guide
• MLA 9th Edition Guide
• Chicago Citation Guide
• Harvard Referencing Guide
• Vancouver Citation Guide
• IEEE Citation Guide
• APA vs Chicago Comparison
• MLA vs Chicago Comparison
• APA vs Harvard Comparison
• Vancouver vs APA Comparison

Conclusion: Citation Styles Match Disciplinary Values

Each academic discipline’s preferred citation style reflects that discipline’s values and priorities. Humanities prioritize textual accuracy and page numbers (MLA, Chicago); sciences prioritize research currency and efficiency with many sources (Vancouver, IEEE); social sciences balance both (APA).

Understanding your field’s citation conventions demonstrates disciplinary fluency and academic professionalism. Most importantly, consistency matters: whichever style your discipline requires, apply it correctly and consistently throughout your work.

Before writing any academic paper, thesis, or article, verify your discipline’s citation requirements with your institution, program, or publication. Then follow those guidelines precisely throughout your work.

---

Ready to master your discipline’s citation style? Choose from our specific guides: APA, MLA, Chicago, Harvard, or other styles.