APA引文

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

芝加哥风格引文

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

MLA引文

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

警告：这些引文格式不一定是100％准确.