Cita APA (7th ed.)

Nagel, T. (1978). The possibility of altruism. Princeton University Press.

Cita Chicago (17th ed.)

Nagel, Thomas. The Possibility of Altruism. Princeton: Princeton University Press, 1978.

Cita MLA (9th ed.)

Nagel, Thomas. The Possibility of Altruism. Princeton University Press, 1978.