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.
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