Hughes, J. (2000). Ecology and historical materialism. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Hughes, Jonathan. Ecology and Historical Materialism. Cambridge ; New York: Cambridge University Press, 2000.
Lua MLA (9ú heag.)Hughes, Jonathan. Ecology and Historical Materialism. Cambridge University Press, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.