1. American Psychiatric Association. (1980).Diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author.
2. American Psychiatric Association. (1987).Diagnostic and statistical manual of mental disorders (3rd ed., rev.). Washington, DC: Author.
3. American Psychiatric Association. (1994).Diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: Author
4. Volkmar, F. R., Klin, A., et al. (1966). Issues in the classification of autism and related conditions. In D. J. Cohen & F. R. Volkmar (eds.),Handbook of autism and pervasive developmental disorders, New York: Wiley.
5. Volkmar, F. R., Klin, A., et al. (1994). Field trial for autistic disorder in DSM-IVAmerican Journal of Psychiatry, 151, 1361–1367.