Norton, Amy. "Physically Active Teens Stay Out of Trouble." Globalrph. 31 Mar. 2006. 11 Apr. 2008
Gavin, Mary L., and Steve Downshen. "Fitness and Your 13-18 Old." Kidshealth. June 2005. Nemours Foundation. 11 Apr. 2008
"Daily Values." Infinite Health Resources. 3 Feb. 2006. U.S. Department of Health. 26 Apr. 2008
by, Jack