(原始内容存档于2015-03-26). Don S. Browning; Martha Christian Green; John Witte. Sex, marriage, and family in world religions. Columbia University Press. 2006
George A. The Government of the Philippine Islands: Its Development and Fundamentals. Philippine Law Collection. Rochester, N.Y.: Lawyers Co-operative Publishing
behavioural disorders. World Health Organization(WHO). 2004 [2008-10-19]. (原始内容存档于2009-03-19). American Psychiatric Association 2000a,第372頁 Parker 1996,第173頁