ELIZABETH KNOWLES. "Cerberus." The Oxford Dictionary of Phrase and Fable. 2006. Encyclopedia.com. 10 Feb. 2010 <http://www.encyclopedia.com>.
ELIZABETH KNOWLES. "Cerberus." The Oxford Dictionary of Phrase and Fable. 2006. Encyclopedia.com. (February 10, 2010). http://www.encyclopedia.com/doc/1O214-Cerberus.html
ELIZABETH KNOWLES. "Cerberus." The Oxford Dictionary of Phrase and Fable. 2006. Retrieved February 10, 2010 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O214-Cerberus.html