1. Alpern, G. D. (1967). Measurement of “untestable” autistic children. Journal of Abnormal Psychology, 72, 478–496.
2. American Psychiatric Association (1980). Diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author.
3. American Psychiatric Association (1987). Diagnostic and statistical manual of Mental Disorders (3rd ed., rev.) Washington, DC: Author.
4. Anderson, G. M., & Hosino, Y. (1987). Neurochemical studies of autism. In D. Cohen & A. Donnellan (Eds.), Handbook of autism and pervasive developmental disorders. New York: Wiley.
5. Asperger, H. (1944). Die ‘autistichen Psychopathen’ im Kindersalter. Archive fur psychiatrie und Nervenkrankheiten, 117, 76–136.