APA (7th ed.) Citation

Judy Kruger, P., Susan A. Carlson, M., & David Buchner, M. (2007). How Active Are Older Americans? Centers for Disease Control and Prevention.

Chicago Style (17th ed.) Citation

Judy Kruger, PhD, MS Susan A. Carlson, and MD David Buchner. How Active Are Older Americans? Centers for Disease Control and Prevention, 2007.

MLA (9th ed.) Citation

Judy Kruger, PhD, et al. How Active Are Older Americans? Centers for Disease Control and Prevention, 2007.