APA (7th ed.) Citation

Grossman, G. M., & Krueger, A. B. (1991). Environmental impacts of a North American free trade agreement. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Grossman, Gene M., and Alan B. Krueger. Environmental Impacts of a North American Free Trade Agreement. Cambridge, Mass: National Bureau of Economic Research, 1991.

MLA (9th ed.) Citation

Grossman, Gene M., and Alan B. Krueger. Environmental Impacts of a North American Free Trade Agreement. National Bureau of Economic Research, 1991.