Online Style Guides

Composition 

Elements of Style - by William Strunk - full text of this classic reference resources

Citing Print or Electronic Sources

APA Format or MLA Format or American Sociological Review Format - from Purdue

Citation Guides  - from the University of Michigan - comprehensive list of web sites for citing print and electronic sources

Style Guides - from the International Federation of Library Associations

Turabian Style Guide - from Univ. of Southern Mississippi

Uncle Sam - citing government publications - from Univ. of Memphis

Citing Electronic Sources

MLA Style  - Modern Language Association

APA - American Psychological Association

Citing Electronic Information in History Papers - by Maurice Crouse

Citation of Legal and Non-Legal Electronic Information - from State Bar of Michigan