APA (7th ed.) Citation

KA, G., DR, B., CL, B., LT, G., SA, H., & RJ, G. (2007). Physical activity and function in older adults: Theory of planned behavior. American Journal of Health Behavior, 31(2), 203. https://doi.org/10.5993/ajhb.31.2.9

Chicago Style (17th ed.) Citation

KA, Gretebeck, Black DR, Blue CL, Glickman LT, Hutson SA, and Gretebeck RJ. "Physical Activity and Function in Older Adults: Theory of Planned Behavior." American Journal of Health Behavior 31, no. 2 (2007): 203. https://doi.org/10.5993/ajhb.31.2.9.

MLA (9th ed.) Citation

KA, Gretebeck, et al. "Physical Activity and Function in Older Adults: Theory of Planned Behavior." American Journal of Health Behavior, vol. 31, no. 2, 2007, p. 203, https://doi.org/10.5993/ajhb.31.2.9.