Cita APA (7a ed.)

Schwartz, D. (2007). Aquinas on friendship. Clarendon Press.

Cita Chicago Style (17a ed.)

Schwartz, Daniel. Aquinas on Friendship. Oxford: Clarendon Press, 2007.

Cita MLA (9a ed.)

Schwartz, Daniel. Aquinas on Friendship. Clarendon Press, 2007.