Rachels, J. (2003). The elements of moral philosophy (4th ed.). McGraw - Hill.
Cita Chicago Style (17a ed.)Rachels, James. The Elements of Moral Philosophy. 4th ed. Boston: McGraw - Hill, 2003.
Cita MLA (9a ed.)Rachels, James. The Elements of Moral Philosophy. 4th ed. McGraw - Hill, 2003.
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