Cita APA (7a ed.)

Warnock, M. (1978). Ethics since 1900 (3rd ed.). Oxford University Press.

Cita Chicago Style (17a ed.)

Warnock, Mary. Ethics Since 1900. 3rd ed. Oxford [etc.]: Oxford University Press, 1978.

Cita MLA (9a ed.)

Warnock, Mary. Ethics Since 1900. 3rd ed. Oxford University Press, 1978.