Chaffee, J. (2017). Thinking critically (12th edition.). Cengage Learning.
Chicago-viite (17. p.)Chaffee, John. Thinking Critically. 12th edition. Boston, MA: Cengage Learning, 2017.
MLA-viite (9. p.)Chaffee, John. Thinking Critically. 12th edition. Cengage Learning, 2017.
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