APA (7th ed.) Citation

Porter, R. (1997). The greatest benefit to mankind: A medical history of humanity. W. W. Norton.

Chicago Style (17th ed.) Citation

Porter, Roy. The Greatest Benefit to Mankind: A Medical History of Humanity. New York: W. W. Norton, 1997.

MLA (8th ed.) Citation

Porter, Roy. The Greatest Benefit to Mankind: A Medical History of Humanity. W. W. Norton, 1997.