Cita APA (7th ed.)

Paffenbarger, R. S., & Olsen, E. (1996). Lifefit: An effective exercise program for optimal health and a longer life. Human Kinectics.

Cita Chicago (17th ed.)

Paffenbarger, Ralph S., i Eric Olsen. Lifefit: An Effective Exercise Program for Optimal Health and a Longer Life. Champaign, IL: Human Kinectics, 1996.

Cita MLA (9th ed.)

Paffenbarger, Ralph S., i Eric Olsen. Lifefit: An Effective Exercise Program for Optimal Health and a Longer Life. Human Kinectics, 1996.