APA引文

Helpman,Elhanan. (1978). A theory of international trade under uncertainty. Academic Press.

Chicago Edition Citation

Helpman,Elhanan. A Theory of International Trade Under Uncertainty. New York: Academic Press, 1978.

MLA引文

Helpman,Elhanan. A Theory of International Trade Under Uncertainty. Academic Press, 1978.

警告：这些引文格式不一定是100％准确.