From Deon Dempsey:
If you are looking for quick reference or manuals of style, try these online sources:

Amercian University Library: http://www.library.american.edu/e_ref/citation.html

For color-coded quick reference see: http://www.liunet.edu/cwis/cwp/library/workshop/citation.htm

For individual links and or further help try:

APA (American Psychological Association) standards: http://webster.commnet.edu/apa/apa_index.htm

The California State University, Chico Publication Guide: http://www.csuchico.edu/pub/PubGuide/writingstyleguide.html

Chicago Manual of Style: http://www.press.uchicago.edu/Misc/Chicago/cmosfaq/cmosfaq.html

The Columbia Guide to Online Style: http://www.columbia.edu/cu/cup/cgos/idx_basic.html