Cita APA (7th ed.)

Rachels, S., & Rachels, J. (2015). The elements of moral philosophy (Eight edition.). McGraw-Hill Education.

Cita Chicago (17th ed.)

Rachels, Stuart, i James Rachels. The Elements of Moral Philosophy. Eight edition. New York, NY: McGraw-Hill Education, 2015.

Cita MLA (9th ed.)

Rachels, Stuart, i James Rachels. The Elements of Moral Philosophy. Eight edition. McGraw-Hill Education, 2015.