Drew, C. (1992). Mental retardation: A life cycle approach (5th.ed.). Macmillan.
Chicago Style (17th ed.) CitationDrew, Clifford. Mental Retardation: A Life Cycle Approach. 5th.ed. New York: Macmillan, 1992.
MLA (9th ed.) CitationDrew, Clifford. Mental Retardation: A Life Cycle Approach. 5th.ed. Macmillan, 1992.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.