Kaplan, M. A. (1957). System and process in international politics. John Wiley & Sons.
芝加哥风格引文Kaplan, Morton A. System and Process in International Politics. New York: John Wiley & Sons, 1957.
MLA引文Kaplan, Morton A. System and Process in International Politics. John Wiley & Sons, 1957.
警告：这些引文格式不一定是100％准确.