Cita APA (7a ed.)

Smith, A. L., & Biddle, S. (2008). Youth physical activity and sedentary behavior: Challenges and solutions. Human Kinetics.

Cita Chicago Style (17a ed.)

Smith, Alan L., y Stuart Biddle. Youth Physical Activity and Sedentary Behavior: Challenges and Solutions. Champaign, Ill: Human Kinetics, 2008.

Cita MLA (9a ed.)

Smith, Alan L., y Stuart Biddle. Youth Physical Activity and Sedentary Behavior: Challenges and Solutions. Human Kinetics, 2008.