Cita APA (7th ed.)
ebrary, Inc, Meine, C., & Knight, R. L. (1999). The essential Aldo Leopold: Quotations and commentaries. University of Wisconsin Press.
Cita Chicago (17th ed.)
ebrary, Inc, Curt Meine, i Richard L. Knight. The Essential Aldo Leopold: Quotations and Commentaries. Madison, WI: University of Wisconsin Press, 1999.
Cita MLA (9th ed.)
ebrary, Inc, et al. The Essential Aldo Leopold: Quotations and Commentaries. University of Wisconsin Press, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.