Ravishankar Kumar Singh, E. (2003). Ecotourism and sustainable development.
Chicago Edition CitationRavishankar Kumar Singh, Ed. Ecotourism and Sustainable Development. Abhijeet Publications, Delhi, 2003.
Cita MLARavishankar Kumar Singh, Ed. Ecotourism and Sustainable Development. 2003.
Atenció: Aquestes cites poden no estar 100% correctes.