APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Hatton, Timothy J., and Jeffrey G. Williamson. Demographic and Economic Pressure on Emigration Out of Africa. Cambridge, Mass, 2001.

MLA (9th ed.) Citation

Hatton, Timothy J., and Jeffrey G. Williamson. Demographic and Economic Pressure on Emigration Out of Africa. 2001.