Perman,Roger. (1999). Natural resource and environmental economics. Longman.
シカゴスタイル引用形Perman,Roger. Natural Resource and Environmental Economics. London: Longman, 1999.
MLA引用形式Perman,Roger. Natural Resource and Environmental Economics. Longman, 1999.
警告: この引用は必ずしも正確ではありません.