APA (7th ed.) Citation

Higdon, H. (1977). Fitness after forty. World Publications.

Chicago Style (17th ed.) Citation

Higdon, Hal. Fitness After Forty. Mountain View, Calif.: World Publications, 1977.

MLA (9th ed.) Citation

Higdon, Hal. Fitness After Forty. World Publications, 1977.

Warning: These citations may not always be 100% accurate.