APA (7th ed.) Citation

Hatton, T. J., & Williamson, J. G. (2001). Demographic and economic pressure on emigration out of Africa. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Hatton, T. J., and Jeffrey G. Williamson. Demographic and Economic Pressure on Emigration Out of Africa. Cambridge, MA: National Bureau of Economic Research, 2001.

MLA (9th ed.) Citation

Hatton, T. J., and Jeffrey G. Williamson. Demographic and Economic Pressure on Emigration Out of Africa. National Bureau of Economic Research, 2001.