Singer, J. D. (1990). Models, methods, and progress in world politics: A peace research odyssey. Westview Press.
Chicago-viite (17. p.)Singer, Joel David. Models, Methods, and Progress in World Politics: A Peace Research Odyssey. Boulder,CO: Westview Press, 1990.
MLA-viite (9. p.)Singer, Joel David. Models, Methods, and Progress in World Politics: A Peace Research Odyssey. Westview Press, 1990.
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