APA (7th ed.) Citation

Diamond, J. M. (2015). Why is sex fun?: The evolution of human sexuality. Weidenfeld & Nicolson.

Chicago Style (17th ed.) Citation

Diamond, Jared M. Why Is Sex Fun?: The Evolution of Human Sexuality. London: Weidenfeld & Nicolson, 2015.

MLA (9th ed.) Citation

Diamond, Jared M. Why Is Sex Fun?: The Evolution of Human Sexuality. Weidenfeld & Nicolson, 2015.

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