1. Achenbach, T. M. (1991a).Manual for the Child Behavior Checklist/4-18 and 1991 Profile. Burlington: University of Vermont, Department of Psychiatry.
2. Burns, B. J., Burke, J. D., & Reiger, D. A. (1982). A child-oriented psychosocial classification system. In M. Lipkin & K. Kupka (Eds.),Psychosocial factors affecting health (pp. 185–208). New York: Prager Scientific.
3. Cartland, J. D., & Yudkowsky, B. K. (1992). Barriers to referral in managed care systems.Pediatrics, 89, 183–192.
4. Costello, E. J. (1990). Child psychiatric epidemiology. In B. Lahey & A. Kazdin (Eds.),Advances in Clinical Child Psychology, Vol. 13 (pp. 53–90). New York: Plenum Press.
5. Costello, E. J., & Shugart, M. A. (1992). Above and below the threshold: Severity of psychiatric symptoms and functional impairment in a pediatric sample.Pediatrics, 90, 359–368.