Many of our databases give you citation help. We have a handout that tells you where to look for help in each database: Caution: Always check a machine-generated citation against a good citation manual; computers are dumb!
The Chicago Manual is a comprehensive publication guide and can be a little confusing. For an easier-to-digest version for students, try Turabian, or in the online version, click the link to Librarian, Teacher, and Student Resources.
A Manual for Writers of Research Papers, Theses, and Dissertations by Kate L. Turabian