Levi, W. (1974). International politics: Foundations of the system. University of Minnesota Press.
芝加哥风格引文Levi, Werner. International Politics: Foundations of the System. Minneapolis: University of Minnesota Press, 1974.
MLA引文Levi, Werner. International Politics: Foundations of the System. University of Minnesota Press, 1974.
警告：这些引文格式不一定是100％准确.