Cita APA (7a ed.)

Foot, P. (1970). Theories of ethics (Repr.). University Press.

Cita Chicago Style (17a ed.)

Foot, Philippa. Theories of Ethics. Repr. Oxford: University Press, 1970.

Cita MLA (9a ed.)

Foot, Philippa. Theories of Ethics. Repr. University Press, 1970.