Rachels, J. (1993). The elements of moral philosophy (2nd.ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Rachels, James. The Elements of Moral Philosophy. 2nd.ed. New York: McGraw-Hill, 1993.
Lua MLA (9ú heag.)Rachels, James. The Elements of Moral Philosophy. 2nd.ed. McGraw-Hill, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.