Cita APA (7th ed.)
Wolff, R. P. Ten Great Works of Philosophy. New American Library.
Cita Chicago (17th ed.)
Wolff, Robert Paul. Ten Great Works of Philosophy. Nueva York, EUA: New American Library.
Cita MLA (9th ed.)
Wolff, Robert Paul. Ten Great Works of Philosophy. New American Library.
Atenció: Aquestes cites poden no estar 100% correctes.