1. Achenbach, T. M., & Rescorla, L. A. (2000). Manual for the ASEBA preschool forms & profiles. Burlington: University of Vermont, Research Center for Children, Youth, & Families.
2. American Psychiatric Association. (2000). Diagnostic and statistical manual of mental disorders–Fourth ed., text rev. Washington, D.C.: American Psychiatric Association.
3. Angold, A., Costello, E. J., & Erkanli, A. (1999). Comorbidity. Journal of Child Psychology and Psychiatry, 40(1), 57–87.
4. Arnold, L. E. (1996). Sex differences in ADHD: conference summary. Journal of Abnormal Psychology, 24(5), 555–569.
5. Barkley, R. A., & Murphy, K. R. (2006). Attention-deficit hyperactivity disorder: A clinical workbook (3rd ed.). New York: The Guilford Press.