Cita APA

Foot, P., & Philippa Foot. (2003). Natural goodness. Oxford,New York: Clarendon,Oxford University Press.

Chicago Style Citation

Foot, Philippa, i Philippa Foot. Natural Goodness. Oxford,New York: Clarendon,Oxford University Press, 2003.

Cita MLA

Foot, Philippa, i Philippa Foot. Natural Goodness. Oxford,New York: Clarendon,Oxford University Press, 2003.

Atenció: Aquestes cites poden no estar 100% correctes.