Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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