APA (7th ed.) Citation

American Association on Intellectual and Developmental Disabilities. (2010). Intellectual disability: Definition, classification, and systems of supports (11th ed.). American Association on Intellectual and Developmental Disabilities.

Chicago Style (17th ed.) Citation

American Association on Intellectual and Developmental Disabilities. Intellectual Disability: Definition, Classification, and Systems of Supports. 11th ed. Washington: American Association on Intellectual and Developmental Disabilities, 2010.

MLA (9th ed.) Citation

American Association on Intellectual and Developmental Disabilities. Intellectual Disability: Definition, Classification, and Systems of Supports. 11th ed. American Association on Intellectual and Developmental Disabilities, 2010.