Cita APA (7a ed.)

Helpman, E., & Razin, A. (1978). A theory of international trade under uncertainty. Academic Press.

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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