Kegley, C. W., & Wittkopf, E. R. (2001). World politics: Trend and transformation (8th ed.). Bedford/St. Martin's Press.
Chicago Style aipamenaKegley, Charles W., and Eugene R. Wittkopf. World Politics: Trend and Transformation. 8th ed. Boston: Bedford/St. Martin's Press, 2001.
MLA aipamenaKegley, Charles W., and Eugene R. Wittkopf. World Politics: Trend and Transformation. 8th ed. Bedford/St. Martin's Press, 2001.
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