1. Intellectual disability: Definition, classification, and systems of supports;American Association on Intellectual and Developmental Disabilities,2010
2. Diagnostic and statistical manual of mental disorders;American Psychiatric Association,2013
3. Neurodevelopmental disorders;American Psychiatric Association,2016
4. Developmental disabilities among Canadians aged 15 years and older, 2012;Bizier,2015
5. The Americans with Disabilities Act and the emerging workforce: Employment of people with mental retardation;Blanck,1998