APA (7th ed.) Citation

Harman, G. (1977). The nature of morality: An introduction to ethics. O.U.P..

Chicago Style (17th ed.) Citation

Harman, Gilbert. The Nature of Morality: An Introduction to Ethics. New York: O.U.P., 1977.

MLA (9th ed.) Citation

Harman, Gilbert. The Nature of Morality: An Introduction to Ethics. O.U.P., 1977.