Ruggiero, V. R. (2001). Beyond feelings: A guide to critical thinking (Sixth edition.). Mayfield Publishing Company.
Chicago-Zitierstil (17. Ausg.)Ruggiero, Vincent Ryan. Beyond Feelings: A Guide to Critical Thinking. Sixth edition. Mountain View, California: Mayfield Publishing Company, 2001.
MLA-Zitierstil (9. Ausg.)Ruggiero, Vincent Ryan. Beyond Feelings: A Guide to Critical Thinking. Sixth edition. Mayfield Publishing Company, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.