To learn more about your responsibility to cite sources, visit the library's Academic Integrity Portal. In short: if you used it, you should cite it.
Various standards have been created for citing sources, including MLA (Modern Language Association), APA (American Psychological Association), and Chicago formats. Specifc professions may adopt their own styles. Please note that standards for citing electronic information are still evolving; many print and electronic style guides may appear to be inconsistent in their instructions.
Your professor may have specified which format you should follow. If not, choose one style to follow, and use that style consistently throughout your paper.
MLA Handbook for Writers of Research Papers - 7th ed.
Robertson Library - Information Desk
MLA Formatting & Style Guide (The Owl at Perdue)
http://owl.english.purdue.edu/owl/resource/747/01
Son of Citation Machine - to help format citations
http://citationmachine.net
MLA Citation Style (Cornell University Library)
http://www.library.cornell.edu/resrch/citmanage/mla
APA Style Guide to Electronic References
E-Book
Chicago Manual of Style -- 16th ed.
REF: Z253.C54 2010 (also copy at Information Desk)
Electronic Styles: A Handbook for Citing Electronic Information
Robertson Library - Information Desk
Cite Right: A Quick Guide to Citation Styles: MLA, Chicago, the Sciences, Professions, and More
PN171.F56L55 2011
Note: 
is a web-based reference management tool which you can use to create and format bibliographies using various citation styles.
Created by: Suzanne Jones, B.A., M.L.S.
Date Created: 16-October-2000
Date Revised: 4-February-2014