Title of article :
Mental Retardation: Definition, Classification, and Systems of Support: Luckasson, R., Borthwick-Duffy, S., Buntinx, W. H. E., Coulter, D. L., Craig, E. M., Reeve, A., Schalock, R. L., Snell, M., Spitalnik, D. M., Spreat, S., & Tasse, M. J. (2002). Washin
