Drew, C. (1992). Mental retardation: A life cycle approach (5th.ed.). Macmillan.
Cita Chicago Style (17a ed.)Drew, Clifford. Mental Retardation: A Life Cycle Approach. 5th.ed. New York: Macmillan, 1992.
Cita MLA (9a ed.)Drew, Clifford. Mental Retardation: A Life Cycle Approach. 5th.ed. Macmillan, 1992.
Precaución: Estas citas no son 100% exactas.