Cita APA (7th ed.)
Rachels, J. (1993). The elements of moral philosophy (2nd ed.). McGraw-hill.
Cita Chicago (17th ed.)
Rachels, James. The Elements of Moral Philosophy. 2nd ed. New York: McGraw-hill, 1993.
Cita MLA (9th ed.)
Rachels, James. The Elements of Moral Philosophy. 2nd ed. McGraw-hill, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.