Crocker, T. D. (1971). Environmental economics. Dryden.
芝加哥风格引文Crocker, Thomas D. Environmental Economics. Hindsdale: Dryden, 1971.
MLA引文Crocker, Thomas D. Environmental Economics. Dryden, 1971.
警告：这些引文格式不一定是100％准确.
APA引文