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Chicago Manual of Style 17 Updates

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The Chicago Manual of Style (CMOS) has been one of the most popular writing resources since its first publication in 1906. Earlier this fall, the University of Chicago Press presented their 17th edition of the official manual. Here at BibMe, we took a look and examined what has changed in CMOS 17. See below for our overview of what we think you need to know about the updated citation formatting rules.

CMoS 17: Notes-Bibliography Style

How to format titles for websites.

If the website you are trying to cite has a print counterpart, such as the website for a newspaper, the title should be in italics. If it does not, it should not be in italics.


  • The Wall Street Journal
  • Gizmodo

The use of “ibid.”

Instead of using “ibid” for repeated citations, CMoS 17 now prefers that a shortened version of the footnote is used.


  1. Henry, The Ambassadors, 401–2.
  2. Henry, 433.
  3. Gailbraith, The Silkworm, 37–38.
  4. Gailbraith, 201–2.

CMoS 17: Author-Date Style

Repeating the year in certain author-date citations.

It is now acceptable to repeat the year in citations where the month and day are listed.

Lin, Meng-Fen Grace, Ellen S. Hoffman, and Claire Borengasser. 2013. “Is Social Media Too Social for Class? A Case Study of Twitter Use.” New York Times, February 15, 2013. Accessed March 2, 2013. http://www.nytimes.com/2013/03/02/science/social-media.

For more information on CMoS 17, please visit the official Chicago Manual of Style website.

Need general citing your sources in Chicago or Turabian style? BibMe here, at your service! Use our citation services to easily create citations for websites, pictures books, online videos, and much more! In case you don’t need Chicago style, it should be mentioned that BibMe also supports citations in MLA format, APA citation format, and thousands of other citations styles.

If you’re nearing the end of your writing process, also check out BibMe Plus’s grammar check! It can help you catch unintentional writing mistakes and you can upload a paper for free!

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