Cita APA (7th ed.)

Crosby, A. W. (1977). The columbian exchange: Biological and cultural consequences of 1942 (4a. ed.). Greenwood Press.

Cita Chicago (17th ed.)

Crosby, Alfred W. The Columbian Exchange: Biological and Cultural Consequences of 1942. 4a. ed. Santa Bárbara: Greenwood Press, 1977.

Cita MLA (9th ed.)

Crosby, Alfred W. The Columbian Exchange: Biological and Cultural Consequences of 1942. 4a. ed. Greenwood Press, 1977.