APA (7th ed.) Citation

Aghion, P., Antràs, P., & Helpman, E. (2004). Negotiating free trade. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Aghion, Philippe, Pol Antràs, and Elhanan Helpman. Negotiating Free Trade. Cambridge, Mass: National Bureau of Economic Research, 2004.

MLA (9th ed.) Citation

Aghion, Philippe, et al. Negotiating Free Trade. National Bureau of Economic Research, 2004.