Singer, J. D. (1990). Models, methods, and progress in world politics: A peace research odyssey. Westview Press.
Citazione stile Chigago Style (17a edizione)Singer, Joel David. Models, Methods, and Progress in World Politics: A Peace Research Odyssey. Boulder,CO: Westview Press, 1990.
Citatione MLA (9a ed.)Singer, Joel David. Models, Methods, and Progress in World Politics: A Peace Research Odyssey. Westview Press, 1990.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.