Cita APA (7th ed.)

LaLanne, E., & Benyo, R. (1989). Fitness after 50 workout. S. Greene Press/Pelham Books ; Distributed by Viking Penguin.

Cita Chicago (17th ed.)

LaLanne, Elaine, i Richard Benyo. Fitness After 50 Workout. [Lexington, MA] : New York, N.Y., U.S.A.: S. Greene Press/Pelham Books ; Distributed by Viking Penguin, 1989.

Cita MLA (8th ed.)

LaLanne, Elaine, i Richard Benyo. Fitness After 50 Workout. S. Greene Press/Pelham Books ; Distributed by Viking Penguin, 1989.