APA (7th ed.) Citation

Nesse, R. M., & Williams, G. C. (1994). Why we get sick: The new science of Darwinian medicine. Times Books.

Chicago Style (17th ed.) Citation

Nesse, Randolph M., and George C. Williams. Why We Get Sick: The New Science of Darwinian Medicine. New York: Times Books, 1994.

MLA (9th ed.) Citation

Nesse, Randolph M., and George C. Williams. Why We Get Sick: The New Science of Darwinian Medicine. Times Books, 1994.