APA (7th ed.) Citation

Hanson, G. H., Robertson, R., & Spilimbergo, A. (1999). Does border enforcement protct U.S. workers from illegal immigrationn. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Hanson, Gordon H., Raymond Robertson, and Antonio Spilimbergo. Does Border Enforcement Protct U.S. Workers from Illegal Immigrationn. Cambridge: National Bureau of Economic Research, 1999.

MLA (9th ed.) Citation

Hanson, Gordon H., et al. Does Border Enforcement Protct U.S. Workers from Illegal Immigrationn. National Bureau of Economic Research, 1999.

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