Chicago citation guide

Citations 8 min read

Chicago has two systems, and using the wrong one is a common source of lost marks. History and most humanities courses use notes and bibliography, with footnotes. Many social-science courses use author-date, which looks closer to APA.

Which system does your course use?

  • Notes and bibliography: superscript numbers in the text, footnotes at the page bottom, bibliography at the end - standard for history
  • Author-date: parenthetical (Author year, page) plus a reference list - common in the sciences and some social sciences
  • If the syllabus only says 'Chicago', assume notes and bibliography in a humanities course, and confirm with your instructor

Footnotes: full and shortened

First (full) note:
1. Amara Sesay, Empire and Railways in East Africa (Chicago: University of Chicago Press, 2018), 142.

Subsequent (shortened) note:
4. Sesay, Empire and Railways, 155.

Journal article note:
2. Daniel Roth, "Freight and Famine," Journal of African History 59, no. 3 (2018): 401.

Bibliography entries

Bibliography entries invert the author name and use periods where notes use commas.

Sesay, Amara. Empire and Railways in East Africa. Chicago: University of Chicago Press, 2018.
Roth, Daniel. "Freight and Famine." Journal of African History 59, no. 3 (2018): 395-420.
Ministry of Lands. "Survey Records, 1921-1934." National Archives, Nairobi.

Author-date form

In text: (Sesay 2018, 142)
Reference list: Sesay, Amara. 2018. Empire and Railways in East Africa. Chicago: University of Chicago Press.

Citing primary sources

Archival material, government records and newspapers are cited in notes with as much locating detail as you have: collection, box, folder, date. Consistency across your notes matters more than perfect uniformity when a source is unusual.

Key takeaways

  • Confirm whether your course wants notes-bibliography or author-date
  • Use a full first note, then shortened notes afterwards
  • Bibliography entries invert the author name and use periods
  • Give archival sources full locating detail in the note

Keep reading

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  • How to cite a book

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Subjects this applies to

  • History

    History help with source-based essays, historiography, document analysis and Chicago-style footnotes across US, European and world history.

  • Political Science

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  • English & Literature

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