1. American Association on Intellectual and Developmental Disorders. (2010). Intellectual disability: Definitions, classifications, and systems of supports (11th ed.). Washington, DC: Author.
2. American Bar Association. Task Force on Mental Disability and the Death Penalty. (2006). Recommendations and report on the death penalty and persons with mental disabilities. Mental and Physical Disability Law Reporter, 30, 668–677.
3. American Educational Research Association, American Psychological Association, and National Council on Measurement in Education. (2014). The standards for educational and psychological testing. Washington, DC: American Educational Research Association.
4. American Psychiatric Association. (1995). Diagnostic and statistical manual of mental disorders (4th ed., international version with ICD-10 codes). Washington, DC: Author.
5. American Psychiatric Association (2000). Diagnostic and statistical manual of mental disorders (4th ed., text revision). Washington, DC: Author.