Cita APA (7a ed.)

Kupperman, J. (1970). Ethical knowledge. George Allen & Unwin Ltd.

Cita Chicago Style (17a ed.)

Kupperman, Joel. Ethical Knowledge. London: George Allen & Unwin Ltd, 1970.

Cita MLA (9a ed.)

Kupperman, Joel. Ethical Knowledge. George Allen & Unwin Ltd, 1970.