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