Cita APA

Rachels, S., & Rachels, J. (2019). The elements of moral philosophy (Ninth edition.). McGraw-Hill.

Citación estilo Chicago

Rachels, Stuart, and James Rachels. The Elements of Moral Philosophy. Ninth edition. New York: McGraw-Hill, 2019.

Cita MLA

Rachels, Stuart, and James Rachels. The Elements of Moral Philosophy. Ninth edition. McGraw-Hill, 2019.