APA aipamena

Foot, P. (1967). Theories of ethics. Oxford U.P..

Chicago Style aipamena

Foot, Philippa. Theories of Ethics. London: Oxford U.P., 1967.

MLA aipamena

Foot, Philippa. Theories of Ethics. Oxford U.P., 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.