APA (7th ed.) Citation

Grossman, G. M., & Helpman, E. (1991). Hysteresis in the trade pattern.

Chicago Style (17th ed.) Citation

Grossman, Gene M., and Elhanan Helpman. Hysteresis in the Trade Pattern. Cambridge, Mass, 1991.

MLA (9th ed.) Citation

Grossman, Gene M., and Elhanan Helpman. Hysteresis in the Trade Pattern. 1991.