Perman, R. (2011). Natural resource and environmental economics. Harlow, Essex: Pearson Addison Wesley.
Trích dẫn kiểu ChicagoPerman, Roger. Natural Resource and Environmental Economics. Harlow, Essex: Pearson Addison Wesley, 2011.
MLA引文Perman, Roger. Natural Resource and Environmental Economics. Harlow, Essex: Pearson Addison Wesley, 2011.
警告:這些引文格式不一定是100%准確.