Cita APA (7th ed.)

Conrad, J. M. (1999). Natural resource economics: Notes and problems. Cambridge University Press.

Cita Chicago (17th ed.)

Conrad, John M. Natural Resource Economics: Notes and Problems. Cambridge: Cambridge University Press, 1999.

Cita MLA (9th ed.)

Conrad, John M. Natural Resource Economics: Notes and Problems. Cambridge University Press, 1999.