http://www.library.cornell.edu/newhelp/res_strategy/citing/apa.html

http://owl.english.purdue.edu/owl/resource/560/01/

http://www.liu.edu/cwis/cwp/library/workshop/citapa.htm

http://www.unc.edu/depts/wcweb/handouts/apa.html

http://owl.english.purdue.edu/owl/resource/560/02/

http://www.indiana.edu/~wts/pamphlets/apa_style.shtml

http://library.osu.edu/sites/guides/apagd.php

http://www.apastyle.org/elecref.html

http://apastyle.apa.org/electext.html

http://employees.csbsju.edu/proske/nursing/APA.htm