Kegley, C. W., & Wittkopf, E. R. (2001). World politics: Trend and transformation (8th ed.). Bedford/St. Martin's Press.
Lua i Stíl Chicago (17ú heag.)Kegley, Charles W., agus Eugene R. Wittkopf. World Politics: Trend and Transformation. 8th ed. Boston: Bedford/St. Martin's Press, 2001.
Lua MLA (9ú heag.)Kegley, Charles W., agus Eugene R. Wittkopf. World Politics: Trend and Transformation. 8th ed. Bedford/St. Martin's Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.