APA (7th ed.) Citation

Evans, C. L., & Harrigan, J. (2003). Distance, time, and specialization. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Evans, Carolyn L., and James Harrigan. Distance, Time, and Specialization. Cambridge, Mass: National Bureau of Economic Research, 2003.

MLA (9th ed.) Citation

Evans, Carolyn L., and James Harrigan. Distance, Time, and Specialization. National Bureau of Economic Research, 2003.