APA (7th ed.) Citation

Silvertown, J. W. (2009). 99% ape: How evolution adds up. The University of Chicago Press.

Chicago Style (17th ed.) Citation

Silvertown, Jonathan W. 99% Ape: How Evolution Adds Up. Chicago: The University of Chicago Press, 2009.

MLA (9th ed.) Citation

Silvertown, Jonathan W. 99% Ape: How Evolution Adds Up. The University of Chicago Press, 2009.