Crosby, A. W. J. (1973). The Columbian exchange: Biological and cultural consequences of 1492. Greenwood Press.
Chicago Style aipamenaCrosby, Alfred W. Jr. The Columbian Exchange: Biological and Cultural Consequences of 1492. Westport, Connecticut: Greenwood Press, 1973.
MLA aipamenaCrosby, Alfred W. Jr. The Columbian Exchange: Biological and Cultural Consequences of 1492. Greenwood Press, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.