Neher, P. A. (1990). Natural resource economics: Conservation and exploitation. Cambrige University Press.
Chicago Style aipamenaNeher, Philip A. Natural Resource Economics: Conservation and Exploitation. New York: Cambrige University Press, 1990.
MLA aipamenaNeher, Philip A. Natural Resource Economics: Conservation and Exploitation. Cambrige University Press, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.