1. Bettleheim, B. (1967). The empty fortress. New York: Free Press.
2. Celiberti, D. A., Alessandri, M. O., Fong, P. L., & Gill, M. J. (1993). Past, present, and future trends in behavioral treatment of ASD. Behavior Therapist, 16, 127–132.
3. Centers for Disease Control and Prevention. (2009). Prevalence of autism spectrum disorders—Autism and developmental disabilities monitoring network, United States 2006.Surveillance Summaries, MMWR 2009;58 (No. SS#10).
4. Dew, D. W., & Alan, G. W. (Eds.). (2007). Rehabilitation of individuals with autism spectrum disorders (Institute on Rehabilitation Monograph No. 32). Washington, DC: The George Washington University, Center for Rehabilitation Counseling Research and Education.
5. Ferster, C. B., & DeMeyer, M. K. (1962). A method for the experimental analysis of the behavior of autistic children. American Journal of Orthopsychiatry, 32, 89–98.