Crosby, A. W. (1986). Ecological Imperialism: The biological expansion of Europe, 900-1900. Cambridge university press.
Dyfyniad Arddull ChicagoCrosby, Alfred W. Ecological Imperialism: The Biological Expansion of Europe, 900-1900. New Delhi: Cambridge university press, 1986.
Dyfyniad MLACrosby, Alfred W. Ecological Imperialism: The Biological Expansion of Europe, 900-1900. Cambridge university press, 1986.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.