Reference:
Kumpfer, K. L. (1998). Selective prevention interventions: The strengthening families program. In R. S. Ashery, E. B. Robertson, & K. L. Kumpfer (Eds.), Drug Abuse Prevention Through Family Interventions (NIDA Research Monograph No. 177. NIH Publication No. 99-4135). Washington, DC: U.S. Government Printing Office.