The Elements of Moral Philosophy (McGraw-Hill, 1999), p. 95
Quotes from book
The Elements of Moral Philosophy

The Elements of Moral Philosophy is a 1986 ethics textbook by the philosophers James Rachels and Stuart Rachels. It explains a number of moral theories and topics, including cultural relativism, subjectivism, divine command theory, ethical egoism, social contract theory, utilitarianism, Kantian ethics, and deontology. The book uses real-life examples in explaining the theories.
The Elements of Moral Philosophy (1999), p. 95
The Elements of Moral Philosophy (1999), p. 183