Southwick, C. H. (1996). Global ecology in human perspective. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Southwick, Charles H. Global Ecology in Human Perspective. New York: Oxford University Press, 1996.
Lua MLA (9ú heag.)Southwick, Charles H. Global Ecology in Human Perspective. Oxford University Press, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.