Chicago Referencing Guide: Author Date Style

If you are still using the 17th ed. of the Guide please use this link to access the online 17th edition manual

The full 18th edition online manual can be found here.

Use the left-hand menu to navigate through each part of the guide. There is a Formatting guidelines page, which gives a brief intro into what sort of information is required for an author-date reference, following that is a list of the most commonly referenced sources, and examples of how they would be referenced.

In 2024, the Chicago referencing style was updated from the 17th to the 18th edtion. Please make sure if you are using the 18th instead of 17th keep these in mind (the examples in this guide are for the 18th edition).

1. Book references no longer require a publisher location.

17th: Coates, Glen. 2002. The Rise and Fall of the Southern Alps. Christchurch, NZ: Canterbury University Press.

18th: Coates, Glen. 2002. The Rise and Fall of the Southern Alps. Canterbury University Press.

2. In-text citations with more than two authors now use the first author then 'et al'.

17th: (Berkman, Bauer and Nold 2011)

18th: (Berkman et al 2011)

3. Reference list entries with more than six authors will list the first three authors, then the phrase 'et al'.

18th: Smith, John, Peter Jones, Jenny Jackson et al.

4. Month or season is now omitted from journal article references.

5. Page range for chapters in an edited book are no longer required.

6. Cititng an illustrator will now be just like an editor (after the source title).

18th: ill. John Smith