Cita APA (7a ed.)

Wolff, R. P. (2014). About philosophy (Eleventh edition, Pearson new international edition.). Pearson.

Cita Chicago Style (17a ed.)

Wolff, Robert Paul. About Philosophy. Eleventh edition, Pearson new international edition. Harlow, England: Pearson, 2014.

Cita MLA (8a ed.)

Wolff, Robert Paul. About Philosophy. Eleventh edition, Pearson new international edition. Pearson, 2014.