Cita APA (7a ed.)

Vernon, M. (2005). The philosophy of friendship. Palgrave Macmillan.

Cita Chicago Style (17a ed.)

Vernon, Mark. The Philosophy of Friendship. New York: Palgrave Macmillan, 2005.

Cita MLA (9a ed.)

Vernon, Mark. The Philosophy of Friendship. Palgrave Macmillan, 2005.