Cita APA

Rachels, J., & Rachels, S. (2007). The elements of moral philosophy (5th ed.). McGraw-Hill.

Chicago Edition Citation

Rachels, James, i Stuart Rachels. The Elements of Moral Philosophy. 5th ed. Boston: McGraw-Hill, 2007.

Cita MLA

Rachels, James, i Stuart Rachels. The Elements of Moral Philosophy. 5th ed. McGraw-Hill, 2007.