1. Achenbach, T. M. (1991). Manual for the Child Behavior Checklist/4-18 and 1991 profile. Burlington: University of Vermont, Department of Psychiatry.
2. American Psychiatric Association. (1980). The diagnostic and statistical manual of mental disorders (3rd ed.). Washington, DC: Author.
3. American Psychiatric Association. (1987). The diagnostic and statistical manual of mental disorders (3rd ed., rev.). Washington, DC: Author.
4. American Psychiatric Association. (1994). The diagnostic and statistical manual of mental disorders (4th ed.). Washington, DC: Author.