Chicago Style: two styles in one
The Chicago Manual of Style includes 2 documentation styles: the Notes-Bibliography System (NB), used by those in literature, history, and the arts, and the Author-Date System, which is similar in content, slightly different in form, and preferred in the social sciences.
What is the difference between Chicago Style and Turabian?
A Manual for writers of Research Papers, Theses, and Dissertations, frequently called just "Turabian" is the student version of Chicago Style. The two are very similar with only a few slight differences aimed at students such as requiring the date of access for websites. While they are generally the same, consistency is key, and rules such as access dates should be applied evenly throughout your citations and references.
Full explanations, examples, and quick reference can be found below in the official guide, text, and guides created by other universities: