MLA Style

"D.P.H.." Webster's New World College Dictionary. LoveToKnow, n.d. Web. 27 December 2009. <http://www.yourdictionary.com/d-p-h-abbv>.

APA Style

D.P.H.. (n.d.). In Webster's New World College Dictionary. Retrieved December 27th, 2009, from http://www.yourdictionary.com/d-p-h-abbv