PAPP, D. S. (2002). Contemporary International relations: Frameworks for understanding. Longman.
Lua i Stíl Chicago (17ú heag.)PAPP, Daniel S. Contemporary International Relations: Frameworks for Understanding. Longman, 2002.
Lua MLA (8ú heag.)PAPP, Daniel S. Contemporary International Relations: Frameworks for Understanding. Longman, 2002.
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