Dhankhar, R. (2006). Environmental studies. Daya Publishing House.
シカゴスタイル引用形Dhankhar, Rajesh. Environmental Studies. Delhi: Daya Publishing House, 2006.
MLA引用形式Dhankhar, Rajesh. Environmental Studies. Daya Publishing House, 2006.
警告: この引用は必ずしも正確ではありません.