Chawla, R. (2006). Ecology and tourism development. Sumit enterprises.
シカゴスタイル引用形Chawla, Ramesh. Ecology and Tourism Development. New Delhi: Sumit enterprises, 2006.
MLA引用形式Chawla, Ramesh. Ecology and Tourism Development. Sumit enterprises, 2006.
警告: この引用は必ずしも正確ではありません.