APA (7th ed.) Citation

Parfit, D., & Scheffler, S. (2011). On what matters. Oxford University Press.

Chicago Style (17th ed.) Citation

Parfit, Derek, and Samuel Scheffler. On What Matters. Oxford ; New York: Oxford University Press, 2011.

MLA (9th ed.) Citation

Parfit, Derek, and Samuel Scheffler. On What Matters. Oxford University Press, 2011.