APA's (American Psycological Ass.) style guidelines for electronic resources
http://www.apastyle.org/elecref.html

APA Style Resources
http://www.psychwww.com/resource/apacrib.htm

Bibliographic Style HandBook of University of Illinois
http://www.english.uiuc.edu/cws/wworkshop/bibliostyles.htm

Beyond the MLA HandBook: Documenting Electronic Sources on the Internet 
by Andrew Harnack and Gene Kleppinger
http://english.ttu.edu/kairos/1.2/inbox/mla.html

Citing Electronic Information in History Papers by Maurice Crouse
http://www.people.memphis.edu/~mcrouse/elcite.html

Citing e-texts by Jan Tent
http://www.emich.edu/%7Elinguist/issues/6/6-210.html

Citation Guides for Electronic Documents of IFLA
http://www.ifla.org/I/training/citation/citing.htm

Citation Style Guides for Internet and Electronic Sources (Univ. de Alberta)
http://www.library.ualberta.ca/guides/citation/index.cfm

Comment citer un document électronique? by Rosaire Caron
http://www.bibl.ulaval.ca/doelec/citedoce.html

Cómo citar recursos electrónicos por Assumpció Estivill y Cristóbal Urbano 
Escola Universitària Jordi Rubió i Balaguer de Biblioteconomia i Documentació
http://www.ub.es/biblio/citae-e.htm

Cybercitations in Hawaii's Schools 
an online collection of bibliographic citations of electronic sources
http://kalama.doe.hawaii.edu/hern95/rt007/

Electronic Reference Formats Recommended by APA(American Psychological Association)
http://www.apa.org/journals/webref.html

Information and documentation. Bibliographic references 
Part 2: Electronic documents or parts there of
Excerpts from International Standard ISO 690-2
http://www.nlc-bnc.ca/iso/tc46sc9/standard/690-2e.htm

MLA-Style Citations of Electronic Sources
http://www.columbia.edu/cu/cup/cgos/idx_basic.html

Modificaciones a las Reglas de Catalogación y la Infrestructura de OCLC
para una Organización Efectiva de los Recuros de Internet por Ingrid Hsieh-Yee
http://cuib.laborales.unam.mx/~felipe/cat_Internet/modificaciones.htm

Bibliographic formats for citing electronic information
http://www.uvm.edu/~ncrane/estyles/