APA引用形式

Ravishankar Kumar Singh, E. (2003). Ecotourism and sustainable development.

シカゴスタイル引用形

Ravishankar Kumar Singh, Ed. Ecotourism and Sustainable Development. Abhijeet Publications, Delhi, 2003.

MLA引用形式

Ravishankar Kumar Singh, Ed. Ecotourism and Sustainable Development. 2003.

警告: この引用は必ずしも正確ではありません.