Welk, G. J., Welk, G., Corbin, W. R., & Welk, K. A. Corbin's concepts of fitness and wellness: A comprehensive lifestyle approach (Thirteenth edition.).
Citazione stile Chigago Style (17a edizione)Welk, Gregory J., Greg Welk, William R. Corbin, e Karen A. Welk. Corbin's Concepts of Fitness and Wellness: A Comprehensive Lifestyle Approach. Thirteenth edition.
Citatione MLA (9a ed.)Welk, Gregory J., et al. Corbin's Concepts of Fitness and Wellness: A Comprehensive Lifestyle Approach. Thirteenth edition.
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