Cita APA (7th ed.)
ebrary, Inc, Knight, R. L., & Riedel, S. (2002). Aldo Leopold and the ecological conscience. Oxford University Press.
Cita Chicago (17th ed.)
ebrary, Inc, Richard L. Knight, i Suzanne Riedel. Aldo Leopold and the Ecological Conscience. Oxford ; New York: Oxford University Press, 2002.
Cita MLA (9th ed.)
ebrary, Inc, et al. Aldo Leopold and the Ecological Conscience. Oxford University Press, 2002.
Atenció: Aquestes cites poden no estar 100% correctes.