Below is an example of a book cited in both styles.
Humanities Style:
Author-Date System:
The Chicago Manual of Style presents two basic documentation systems: the humanities style (notes and bibliography) and the author-date system. Choosing between the two often depends on subject matter and nature of sources cited, as each system is favored by different groups of scholars.
The humanities style is preferred by many in literature, history, and the arts.
The more concise author-date system has long been used by those in the physical, natural, and social sciences.
http://www.chicagomanualofstyle.org/tools_citationguide.html
TURABIAN?
"Chicago" and "Turabian" both refer to the same basic style of citation. The Chicago Manual of Style is a lengthy tome that covers all aspects of style, including capitalization, punctuation, etc. Kate Turabian wrote a book (A Manual for Writers of Term Papers, Theses, and Dissertations) that condenses the citation-related information in the Chicago Manual into a more readily-accessible format.