APA (7th ed.) Citation

Grossman, G. M., & Helpman, E. (1990). Trade, knowledge spillovers, and growth. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Grossman, Gene M., and Elhanan Helpman. Trade, Knowledge Spillovers, and Growth. Cambridge, Mass: National Bureau of Economic Research, 1990.

MLA (9th ed.) Citation

Grossman, Gene M., and Elhanan Helpman. Trade, Knowledge Spillovers, and Growth. National Bureau of Economic Research, 1990.

Warning: These citations may not always be 100% accurate.