Sadeleer, N. d. (2008). Environmental Principles. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Sadeleer, Nicholas de. Environmental Principles. New York: Oxford University Press, 2008.
Lua MLA (9ú heag.)Sadeleer, Nicholas de. Environmental Principles. Oxford University Press, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.