APA (7th ed.) Citation

Nesse, R. M., & Williams, G. C. (1995). Why we get sick: The new science of darwinian medicine. Vintage 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, USA: Vintage Books, 1995.

MLA (9th ed.) Citation

Nesse, Randolph M., and George C. Williams. Why We Get Sick: The New Science of Darwinian Medicine. Vintage Books, 1995.