APA (7th ed.) Citation

Olafson, F. A. (1973). Ethics and twentieth century thought. Prentice-Hall.

Chicago Style (17th ed.) Citation

Olafson, Frederick A. Ethics and Twentieth Century Thought. Englewood Cliffs, N.J.: Prentice-Hall, 1973.

MLA (8th ed.) Citation

Olafson, Frederick A. Ethics and Twentieth Century Thought. Prentice-Hall, 1973.