1. Bender, L. (1947). Clinical study of one hundred schizophrenic children.American Journal of Orthopsychiatry, 17, 40?56.
2. Coleman, M. (1980, November 7).The autistic syndromes. Paper presented at the International Symposium on Autism, Woodbury, New York.
3. Doll, E. (1965).Vineland social maturity scale. Circle Pines, Minnesota: American Guidance Service.
4. Kanner, L. (1943). Autistic disturbances of affective contact.Nervous Child, 2, 217?250.
5. Klecka, W. (1975). Discriminant analysis. In N. H. Nie, C. H. Hull, J. G. Jenkins, K. Steinbrenner, & D. H. Bent (Eds.),Statistical packages for the social sciences. New York: McGraw-Hill.