The following sites can provide some useful guidelines for citing resources.

APA Style:

• The Basics of APA Style  - a free tutorial from the APA web site. 

• Social Sciences: Documenting Sources by Diana Hacker. It provides a general overview of APA style, including how to cite print resources.

Chicago Style:

• History: Documenting Sources by Diana Hacker. It provides a general overview of Chicago style, including how to cite print resources.

• Sciences: Documenting Sources by Diana Hacker. It provides a general overview of CSE style, including how to cite print resources.

• Humanities: Documenting Sources by Diana Hacker. It provides a general overview of MLA style, including how to cite print resources.

Turabian:

• Brief Citation Guide for Internet Sources in History and the Humanities

Citation Builders:

These sites allow you to input information about your source (book, journal article, web site, etc.) into a form and they will create a citation for that source in the formatting style of your choice (APA, MLA, etc.).

• Citation Machine
• KnightCite (Calvin College's Hekman Library)
• UNC Library Citation Builder (University of North Carolina)