APA (7th ed.) Citation

Prehoda, R. W. (1968). Extended youth: The promise of gerontology. G.P. Putnam's Sons.

Chicago Style (17th ed.) Citation

Prehoda, Robert W. Extended Youth: The Promise of Gerontology. New York: G.P. Putnam's Sons, 1968.

MLA (9th ed.) Citation

Prehoda, Robert W. Extended Youth: The Promise of Gerontology. G.P. Putnam's Sons, 1968.

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