Citations

Several citation styles MLA style, APA style, Chicago Style, CBE, other.
Chicago Manual of Style Shows examples of citations for books, journal articles, electronic sources, internet, etc.
Columbia Guide to Online Style Advertised as the most comprehensive guide to online style. Although this is an advertisement for the book if has great material on actual citations
Ephrate School District Bibliographic Style Manual Chosen by Access PA
MLA (Modern Language Association) A Guide for Writing Research Papers Based on Modern Language Association (MLA) Documentation. Prepared by the Humanities Department and the Arthur C. Banks Jr. Library
Using MLA format Written by the Purdue University Online Writing Lab