Chicago is the citation style most frequently used in the study of history. If you have questions about what best suits your assignment, or about the expectations for your class, check in with your professor.

About Chicago Style and Turabian

Chicago (University of Chicago Press) style is most commonly used to inform style and citations in the humanities and social sciences, including history. Turabian is a relative of Chicago Style.

What is the difference between Chicago and Turabian? 

The primary difference is that Turabian is shorter and contains fewer instructions, and does not contain information about publication. The Chicago Manual of Style is designed for professionals in the field who are publishing, and has a great deal of instruction on formatting and many other things. Turabian is a pared-down version designed for students writing research papers.

Which should I use?

You should always talk to your professor, but for the most part, all of the guidelines that you find in Turabian help pages will also apply to Chicago style.  - From the Muskingum University Libugide for Chicago

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