1. Diagnostic and Statistical Manual of Mental Disorders—DSM IVTR. 4th ed, Text revision.,2000
2. The ICD-10 Guide for Mental Retardation.,1996
3. Mental Retardation: Definition, Classification, and Systems of Supports. 10th ed.,2002
4. Mental retardation: past, present, and future.;Crissey;Am Psychol,1975
5. Residential and lifestyle changes for adults with intellectual disability in Queensland 1960–2001.;Young;Int J Disabil Dev Educ,2003