Berlage, G., & Engelman, W. (1999). Understanding social issues: Critical thinking and analysis (5th ed.). Allyn and Beacon.
Citace podle Chicago (17th ed.)Berlage, Gai, a William Engelman. Understanding Social Issues: Critical Thinking and Analysis. 5th ed. Boston: Allyn and Beacon, 1999.
Citace podle MLA (9th ed.)Berlage, Gai, a William Engelman. Understanding Social Issues: Critical Thinking and Analysis. 5th ed. Allyn and Beacon, 1999.
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