Knorr, K. E. (1969). Contending approaches to international politics. Princeton University Press.
芝加哥风格引文Knorr, Klaus Eugen. Contending Approaches to International Politics. Princeton, N.J: Princeton University Press, 1969.
MLA引文Knorr, Klaus Eugen. Contending Approaches to International Politics. Princeton University Press, 1969.
警告：这些引文格式不一定是100％准确.