1. Abuzzahab, F. S., & Anderson, F. O. (1977). Gilles de la Tourette’s syndrome: Cross-cultural analysis and treatment outcome. In F. S. Abuzzahab & F. O. Anderson (Eds.), Gilles de la Tourette’s syndrome (Vol. 1 ). St. Paul: Masonal Publishing.
2. Agras, S., & Marshall, C. (1965). The application of negative practice to spasmodic torticollis. American Journal of Psychiatry, 122, 579–582.
3. American Psychiatric Association (1975). A psychiatric glossary. Washington, DC: Author.
4. American Psychiatric Association. (1980). Diagnostic and statistical manual of mental disorders ( 3rd ed. ). Washington, DC: Author.
5. American Psychiatric Association. (1987). Diagnostic and statistical manual of mental disorders (3rd ed. rev.). Washington, DC: Author.