APA (7th ed.) Citation

Wolff, R. P. (1976). About philosophy. Prentice-Hall.

Chicago Style (17th ed.) Citation

Wolff, Robert Paul. About Philosophy. Englewood Cliffs, N.J: Prentice-Hall, 1976.

MLA (9th ed.) Citation

Wolff, Robert Paul. About Philosophy. Prentice-Hall, 1976.