APA (7th ed.) Zitazioa

FOOT, P. (1967). Theories of ethics. O.U.Pr.

Chicago Style (17th ed.) Zitazioa

FOOT, Philippa. Theories of Ethics. Oxford: O.U.Pr, 1967.

MLA (9th ed.) Zitazioa

FOOT, Philippa. Theories of Ethics. O.U.Pr, 1967.