Cita APA (7a ed.)

Urmson, J. O. (1968). The emotive theory of ethics. Hutchinson.

Cita Chicago Style (17a ed.)

Urmson, J. O. The Emotive Theory of Ethics. London: Hutchinson, 1968.

Cita MLA (9a ed.)

Urmson, J. O. The Emotive Theory of Ethics. Hutchinson, 1968.