Smith, A. L., & Biddle, S. (2008). Youth physical activity and sedentary behavior: Challenges and solutions. Human Kinetics.
Lua i Stíl Chicago (17ú heag.)Smith, Alan L., agus Stuart Biddle. Youth Physical Activity and Sedentary Behavior: Challenges and Solutions. Champaign, Ill: Human Kinetics, 2008.
Lua MLA (9ú heag.)Smith, Alan L., agus Stuart Biddle. Youth Physical Activity and Sedentary Behavior: Challenges and Solutions. Human Kinetics, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.