1. Douglas KA, Collins JL, Warren C, et al. Results from the 1995 National College Risk Behavior Survey. J Am Coll Health. 1997;46:55-66.
2. Grunbaum JA, Kann L, Kinchen S, et al. Youth risk behavior surveillance-United States, 2001. MMWR. 2002;51:1-64.
3. Calfas KJ, Sallis JF, Lovato CY, Campbell J. Physical activity and its determinants before and after college graduation. Med Exerc Nutr Health. 1994;3:323-334.
4. Dishman RK, Buckworth J. Increasing physical activity: a quantitative synthesis. Med Sci Sports Exerc. 1996;28:706-719.
5. Dishman RK. Exercise Adherence: Its Impact on Public Health. Champaign, IL: Human Kinetics; 1988.