APA Edition Citation

Helpman, E. (1990). Monopolistic competition in trade theory / Elhanan Helpman. International Finance Section, Department of Economics, Princeton University.

Chicago Edition Citation

Helpman, Elhanan. Monopolistic Competition in Trade Theory / Elhanan Helpman. Princeton, N.J.: International Finance Section, Department of Economics, Princeton University, 1990.

MLA Edition Citation

Helpman, Elhanan. Monopolistic Competition in Trade Theory / Elhanan Helpman. International Finance Section, Department of Economics, Princeton University, 1990.