APA (7th ed.) Zitazioa

Warnock, M. (1978). Ethics since 1900 (3rded.). O.U.P..

Chicago Style (17th ed.) Zitazioa

Warnock, Mary. Ethics Since 1900. 3rded. Oxford: O.U.P., 1978.

MLA (9th ed.) Zitazioa

Warnock, Mary. Ethics Since 1900. 3rded. O.U.P., 1978.