APA (7th ed.) Citation

Hatton, T. J., & Williamson, J. G. (1998). The age of mass migration: Causes and economic impact. Oxford University Press.

Chicago Style (17th ed.) Citation

Hatton, T. J., and Jeffrey G. Williamson. The Age of Mass Migration: Causes and Economic Impact. New York: Oxford University Press, 1998.

MLA (9th ed.) Citation

Hatton, T. J., and Jeffrey G. Williamson. The Age of Mass Migration: Causes and Economic Impact. Oxford University Press, 1998.