Conrad, J. M., & Clark, C. W. (1987). Natural resource economics: Notes and problems. Cambridge [Cambridgeshire] ; New York: Cambridge University Press.
Trích dẫn kiểu ChicagoConrad, Jon M., và Colin W. Clark. Natural Resource Economics: Notes and Problems. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1987.
Deismireacht MLAConrad, Jon M., và Colin W. Clark. Natural Resource Economics: Notes and Problems. Cambridge [Cambridgeshire] ; New York: Cambridge University Press, 1987.
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