Cita APA (7a ed.)

Mackie, J. L. (1990). Ethics: Inventing right and wrong. Penguin.

Cita Chicago Style (17a ed.)

Mackie, J. L. Ethics: Inventing Right and Wrong. London [etc.]: Penguin, 1990.

Cita MLA (9a ed.)

Mackie, J. L. Ethics: Inventing Right and Wrong. Penguin, 1990.