1. Abstinence-only sex education programs have little effect on Texas teenagers' behavior, study says. (2005). Retrieved September 7, 2007, from the Medical News Today Web site: http://www.medicalnewstoday.com/articles/19531.php
2. Bandura, A. (1989). Perceived self-efficacy in the exercise of control over AIDS infection. In V. M. Mays, G. W. Albee & S. F. Schneider (Eds.), Primary prevention of AIDS: Psychological approaches (pp. 128-141). Newbury Park, CA: Sage.
3. Use of levonorgestrel implants versus oral contraceptives in adolescence: A case-control study