Cita APA (7th ed.)

.Conrad, J. M., & .Clark, C. W. (1987). Natural resource economics: Notes and problems. Cambridge University Press.

Cita Chicago (17th ed.)

.Conrad, Jon M., i Colin W. .Clark. Natural Resource Economics: Notes and Problems. [Cambridge [Cambridgeshire ; New York: Cambridge University Press, 1987.

Cita MLA (9th ed.)

.Conrad, Jon M., i Colin W. .Clark. Natural Resource Economics: Notes and Problems. Cambridge University Press, 1987.