APA (7th ed.) Zitazioa
ebrary, Inc, Meine, C., & Knight, R. L. (1999). The essential Aldo Leopold: Quotations and commentaries. University of Wisconsin Press.
Chicago Style (17th ed.) Zitazioa
ebrary, Inc, Curt Meine, eta Richard L. Knight. The Essential Aldo Leopold: Quotations and Commentaries. Madison, WI: University of Wisconsin Press, 1999.
MLA (9th ed.) Zitazioa
ebrary, Inc, et al. The Essential Aldo Leopold: Quotations and Commentaries. University of Wisconsin Press, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.