MLA stands for Modern Language Association, and is the most standard style of documentation in the humanities, with the exception of APA style for the social sciences (see APA).

Citing Electronic Sources in MLA Style
http://www-english.tamu.edu/wcenter/owl/citing.html

A Sample Bibliography Page
http://www.gmu.edu/departments/writingcenter/handouts/mla.html

Citation and Documentation in the Humanities: MLA Format
http://www.unc.edu/depts/wcweb/handouts/mla.html