APA (7th ed.) Citation

American Association on Intellectual and Developmental Disabilities, editor, Schalock, R. L., Luckasson, R., & Tassé, M. J. (2021). Intellectual disability: Definition, diagnosis, classification, and systems of supports (12th edition.). American Association on Intellectual and Developmental Disabilities.

Chicago Style (17th ed.) Citation

American Association on Intellectual and Developmental Disabilities, editor, Robert L. Schalock, Ruth Luckasson, and Marc J. Tassé. Intellectual Disability: Definition, Diagnosis, Classification, and Systems of Supports. 12th edition. Silver Spring, MD: American Association on Intellectual and Developmental Disabilities, 2021.

MLA (9th ed.) Citation

American Association on Intellectual and Developmental Disabilities, editor, et al. Intellectual Disability: Definition, Diagnosis, Classification, and Systems of Supports. 12th edition. American Association on Intellectual and Developmental Disabilities, 2021.