APA引文

Polak, J. J. (1954). An international economic system. London: George Allen & Unwin, Ltd.

Trích dẫn kiểu Chicago

Polak, J. J. An International Economic System. London: George Allen & Unwin, Ltd, 1954.

MLA引文

Polak, J. J. An International Economic System. London: George Allen & Unwin, Ltd, 1954.

警告：这些引文格式不一定是100％准确.