Salvy, S., Roemmich, J. N., Bowker, J. C., Romero, N. D., Stadler, P. J., & Epstein, L. H. (2009). Effect of Peers and Friends on Youth Physical Activity and Motivation to be Physically Active. Oxford University Press.

Salvy, Sarah-Jeanne, James N. Roemmich, Julie C. Bowker, Natalie D. Romero, Phillip J. Stadler, a Leonard H. Epstein. Effect of Peers and Friends On Youth Physical Activity and Motivation to Be Physically Active. Oxford University Press, 2009.

Salvy, Sarah-Jeanne, et al. Effect of Peers and Friends On Youth Physical Activity and Motivation to Be Physically Active. Oxford University Press, 2009.