APA (7th ed.) Citation

Harzig, C., Hoerder, D., & Gabaccia, D. R. (2009). What is migration history? Polity.

Chicago Style (17th ed.) Citation

Harzig, Christiane, Dirk Hoerder, and Donna R. Gabaccia. What Is Migration History? Cambridge, UK ; Malden, MA: Polity, 2009.

MLA (9th ed.) Citation

Harzig, Christiane, et al. What Is Migration History? Polity, 2009.