Here are some additional citation formats and style guides:

Chicago Style Manual:  http://www.chicagomanualofstyle.org/home.html

Council of Biology Editors:  http://www.monroecc.edu/depts/library/cbe.htm

American Sociological Association:  http://owl.english.purdue.edu/owl/resource/583/01/

United States National Library of Medicine (NLM style) offers a numbered citation-format.  Essentially it is numbered references in alphabetical order with numbers in the body of the report or manuscript. http://www.nlm.nih.gov/citingmedicine