APA (7th ed.) Citation

Purtill, R. L. (1976). Thinking about ethics. Prentice-Hall.

Chicago Style (17th ed.) Citation

Purtill, Richard L. Thinking About Ethics. Englewood Cliffs, N.J: Prentice-Hall, 1976.

MLA (9th ed.) Citation

Purtill, Richard L. Thinking About Ethics. Prentice-Hall, 1976.