1. F. M. Bulter, S. P. Miller, K. Lee, and T. Pierce, “Teaching Mathematics to Students with Mild-to-Moderate Mental Retardation: A Review of the Literature,” Intellect. Dev. Disabil., 39(1), pp. 20–31 (2001).
2. A rational approach to the child with mental retardation for the paediatrician
3. A. P. Assosiation, Diagnostic and Statistical Manual of Mental Disorders, 3rd edison revied (DSM-III). (Washington: American Psychiatric Pub, 1980).
4. P. Ainsworth and P. C. Baker, “Understanding Mental Retardation,” (United States: University Press of Mississippi, 2004).
5. R. M. Hodapp, “Parenting Children with Mental Retardation. In M. H. Bornstein (Ed) Handbook of Parenting: Children and Parenting,” (New Jersey: Lawrence Erlbaum Associates Publishers, 2002).