Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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