APA (7th ed.) Citation

Mill, J. S., Bentham, J., & Ryan, A. (1987). Utilitarism and other essays. Penguin Books.

Chicago Style (17th ed.) Citation

Mill, John Stuart, Jeremy Bentham, and Alan Ryan. Utilitarism and Other Essays. London: Penguin Books, 1987.

MLA (9th ed.) Citation

Mill, John Stuart, et al. Utilitarism and Other Essays. Penguin Books, 1987.