Crane, L. (2002). Mental retardation: A community integration approach . Belmont, CA: Wadsworth.
2.
Luckasson, R., Couter, D., Polloway, E., Reiss, S., Schalock, R., Snell, M., et al. (2002). Mental retardation: Definition, classification, and systems of supports (9th ed). Washington, DC: American Association on Mental Retardation .
3.
Smith, T.E.C., Polloway, E.A., Patton, J.R., & Dowdy, C.A. (2004). Teaching students with special needs in inclusive settings (4th ed.). Boston: Allyn & Bacon.