(2002). Mental retardation: Definition, classification, and systems of supports. Workbook (10a. ed.). American Association on Mental Retardation.
Chicago-Zitierstil (17. Ausg.)Mental Retardation: Definition, Classification, and Systems of Supports. Workbook. 10a. ed. Washington, D.C: American Association on Mental Retardation, 2002.
MLA-Zitierstil (9. Ausg.)Mental Retardation: Definition, Classification, and Systems of Supports. Workbook. 10a. ed. American Association on Mental Retardation, 2002.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.