Singer, J. D. (1990). Models, methods, and progress in world politics: A peace research odyssey. Westview Press.
Chicago-referens (17:e uppl.)Singer, Joel David. Models, Methods, and Progress in World Politics: A Peace Research Odyssey. Boulder,CO: Westview Press, 1990.
MLA-referens (9:e uppl.)Singer, Joel David. Models, Methods, and Progress in World Politics: A Peace Research Odyssey. Westview Press, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.