APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Clark, Colin Whitcomb, and Joseph Conrad. Natural Resource Economics: Notes and Problems. New York: Cambridge university, 1987.

MLA (8th ed.) Citation

Clark, Colin Whitcomb, and Joseph Conrad. Natural Resource Economics: Notes and Problems. Cambridge university, 1987.