Rachels, J. (1999). The elements of moral philosophy (3rd ed.). McGraw-Hill College.
Chicago-viite (17. p.)Rachels, James. The Elements of Moral Philosophy. 3rd ed. Boston: McGraw-Hill College, 1999.
MLA-viite (8. p.)Rachels, James. The Elements of Moral Philosophy. 3rd ed. McGraw-Hill College, 1999.
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