Official Chicago Citation Style Guide Manual:
The author-date format is most popular in the physical, natural, and social sciences, whereas researchers in literary, historical, and artistic fields mostly use note-based styles. For the note-based variants, the notes can either be self-explanatory and come with or without a bibliography (full note), or serve as a reference to a bibliographic entry (note).
The library supports two tools designed to help you keep track of and write citations. Below are the pros and cons of each tool.
NoodleBib: A step-by-step tool for creating and storing MLA, APA, and Chicago/Turabian styles.
Zotero: A tool for many citation styles. Ability to capture information quickly from web pages, online catalogs, webpages, etc.