Crosby, A. W. (1993). Ecological imperialism: The biological expansion of Europe, 900-1900 (Canto edition.). Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Crosby, Alfred W. Ecological Imperialism: The Biological Expansion of Europe, 900-1900. Canto edition. Cambridge, United Kingdom: Cambridge University Press, 1993.
Lua MLA (9ú heag.)Crosby, Alfred W. Ecological Imperialism: The Biological Expansion of Europe, 900-1900. Canto edition. Cambridge University Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.