Levi, W. (1974). International politics: Foundations of the system. University of Minnesota Press.
استشهاد بنمط شيكاغوLevi, Werner. International Politics: Foundations of the System. Minneapolis: University of Minnesota Press, 1974.
MLA استشهادLevi, Werner. International Politics: Foundations of the System. University of Minnesota Press, 1974.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.