Lua APA (7ú heag.)
Attfield, R. (1991). The Ethics of Environmental Concern (2nd ed.). University of Georgia Press.
Lua i Stíl Chicago (17ú heag.)
Attfield, Robin. The Ethics of Environmental Concern. 2nd ed. Athens, Ga.: University of Georgia Press, 1991.
Lua MLA (9ú heag.)
Attfield, Robin. The Ethics of Environmental Concern. 2nd ed. University of Georgia Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.