APA
Rachels J., Rachels S., . (2019). The elements of moral philosophy. Boston: McGraw-Hill College.
Chicago
Rachels James, Rachels Stuart, . 2019. The elements of moral philosophy. Boston: McGraw-Hill College.
Harvard
Rachels J., Rachels S., . (2019). The elements of moral philosophy. Boston: McGraw-Hill College.
MLA
Rachels James, Rachels Stuart, . The elements of moral philosophy. Boston: McGraw-Hill College. 2019.