Which system should I use?

Follow your department's handbook. If nothing is specified, humanities courses usually expect notes and bibliography.

Do I include the place of publication?

No. Since the 17th edition, and still in the 18th, the place of publication is left out for books with a named publisher.

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Create a Chicago 18 citation for notes and bibliography or author-date format.

Often used for history, art history, theology and publishing.

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Day

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Two systems: Use notes and bibliography for footnotes, or author-date for citations in the text.
Author names: Write the first author surname first. List up to six authors. For seven or more, list the first three and add “et al.”
Titles: Use headline capitalisation. Italicise books and journals. Put articles and chapters in quotation marks.
Publication details: Add the publisher and year. For journals, include the volume, issue and page range.

Book
Tuchman, Barbara W. The Guns of August. Macmillan, 1962.
Journal article
Sweller, John. “Cognitive Load during Problem Solving.” Cognitive Science 12, no. 2 (1988): 257–285.
Web page
Google. “Privacy Policy.” Google Policies. July 1, 2023. https://policies.google.com/privacy.

Which system should I use?: Follow your department's handbook. If nothing is specified, humanities courses usually expect notes and bibliography.
Do I include the place of publication?: No. Since the 17th edition, and still in the 18th, the place of publication is left out for books with a named publisher.