APA (7th ed.) Zitazioa
ebrary, Inc, Knight, R. L., & Riedel, S. (2002). Aldo Leopold and the ecological conscience. Oxford University Press.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, Richard L. Knight, eta Suzanne Riedel. Aldo Leopold and the Ecological Conscience. Oxford ; New York: Oxford University Press, 2002.
MLA (9th ed.) Zitazioa
ebrary, Inc, et al. Aldo Leopold and the Ecological Conscience. Oxford University Press, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.