Smith, A. L., & Biddle, S. (2008). Youth physical activity and sedentary behavior: Challenges and solutions. Human Kinetics.
Chicago-viite (17. p.)Smith, Alan L., ja Stuart Biddle. Youth Physical Activity and Sedentary Behavior: Challenges and Solutions. Champaign, Ill: Human Kinetics, 2008.
MLA-viite (9. p.)Smith, Alan L., ja Stuart Biddle. Youth Physical Activity and Sedentary Behavior: Challenges and Solutions. Human Kinetics, 2008.
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