Ruggiero, V. R. (1992). Thinking critically about ethical issues (3rd ed.). Mayfield.
Cita Chicago (17th ed.)Ruggiero, Vincent Ryan. Thinking Critically About Ethical Issues. 3rd ed. Mountain View, Calif.: Mayfield, 1992.
Cita MLA (8th ed.)Ruggiero, Vincent Ryan. Thinking Critically About Ethical Issues. 3rd ed. Mayfield, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.