APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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