APA (7th ed.) Citation

Hayflick, L. (1994). How and why we age. Ballantine Books.

Chicago Style (17th ed.) Citation

Hayflick, Leonard. How and Why We Age. New York: Ballantine Books, 1994.

MLA (9th ed.) Citation

Hayflick, Leonard. How and Why We Age. Ballantine Books, 1994.

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