Ruggiero, V. R. (1992). Thinking critically about ethical issues (3rd ed.). Mayfield.
Citace podle Chicago (17th ed.)Ruggiero, Vincent Ryan. Thinking Critically About Ethical Issues. 3rd ed. Mountain View, Calif.: Mayfield, 1992.
Citace podle MLA (8th ed.)Ruggiero, Vincent Ryan. Thinking Critically About Ethical Issues. 3rd ed. Mayfield, 1992.
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