APA (7th ed.) Citation

SPENCE, A. P. (1999). Biology of human aging.-- Ed. 2. Prentice Hall.

Chicago Style (17th ed.) Citation

SPENCE, Alaxander P. Biology of Human Aging.-- Ed. 2. New Jersey: Prentice Hall, 1999.

MLA (9th ed.) Citation

SPENCE, Alaxander P. Biology of Human Aging.-- Ed. 2. Prentice Hall, 1999.