APA (7th ed.) Citation

Porter, R. (1999). The greatest benefit to mankind. Fontana.

Chicago Style (17th ed.) Citation

Porter, Roy. The Greatest Benefit to Mankind. London: Fontana, 1999.

MLA (9th ed.) Citation

Porter, Roy. The Greatest Benefit to Mankind. Fontana, 1999.

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