APA (7th ed.) Citation

National Institutes of Health (U.S.) & Lindberg, D. A. B. (2001). Why I exercise. National Institutes of Health.

Chicago Style (17th ed.) Citation

National Institutes of Health (U.S.) and Donald A. B. Lindberg. Why I Exercise. [Bethesda, Md.]: National Institutes of Health, 2001.

MLA (9th ed.) Citation

National Institutes of Health (U.S.) and Donald A. B. Lindberg. Why I Exercise. National Institutes of Health, 2001.