McClelland, C. A. (1966). Theory and the international system. New York: Macmillan.
Trích dẫn kiểu ChicagoMcClelland, Charles A. Theory and the International System. New York: Macmillan, 1966.
MLA引文McClelland, Charles A. Theory and the International System. New York: Macmillan, 1966.
警告：这些引文格式不一定是100％准确.