APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Porter, Roy. The Greatest Benefit to Mankind: A Medical History of Humanity. New York [u.a.]: Norton, 1997.

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.