APA (7th ed.) Citation

Hershey, D. (1974). Lifespan and factors affecting it: Aging theories in gerontology. Thomas.

Chicago Style (17th ed.) Citation

Hershey, Daniel. Lifespan and Factors Affecting It: Aging Theories in Gerontology. Springfield, Ill.: Thomas, 1974.

MLA (9th ed.) Citation

Hershey, Daniel. Lifespan and Factors Affecting It: Aging Theories in Gerontology. Thomas, 1974.

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