APA (7th ed.) Citation

Crosby, A. W. (1987). The Columbian voyages, the Columbian exchange, and their historians. American Historical Association.

Chicago Style (17th ed.) Citation

Crosby, Alfred W. The Columbian Voyages, the Columbian Exchange, and Their Historians. Washington, D.C: American Historical Association, 1987.

MLA (9th ed.) Citation

Crosby, Alfred W. The Columbian Voyages, the Columbian Exchange, and Their Historians. American Historical Association, 1987.