Prevalence of physical inactivity and its relation to social class in U.S. adults: results from the Third National Health and Nutrition Examination Survey, 1988-1994.

MLA

Crespo, C. J., et al. “Prevalence of Physical Inactivity and Its Relation to Social Class in U.S. Adults: Results from the Third National Health and Nutrition Examination Survey, 1988-1994.” Medicine and Science in Sports and Exercise, vol. 31, no. 12, Dec. 1999, pp. 1821–27. EBSCOhost, https://doi.org/10.1097/00005768-199912000-00019.

APA

Crespo, C. J., Ainsworth, B. E., Keteyian, S. J., Heath, G. W., & Smit, E. (1999). Prevalence of physical inactivity and its relation to social class in U.S. adults: results from the Third National Health and Nutrition Examination Survey, 1988-1994. Medicine and Science in Sports and Exercise, 31(12), 1821–1827. https://doi.org/10.1097/00005768-199912000-00019

Chicago

Crespo, C J, B E Ainsworth, S J Keteyian, G W Heath, and E Smit. 1999. “Prevalence of Physical Inactivity and Its Relation to Social Class in U.S. Adults: Results from the Third National Health and Nutrition Examination Survey, 1988-1994.” Medicine and Science in Sports and Exercise 31 (12): 1821–27. doi:10.1097/00005768-199912000-00019.