Kaushal, P., & Sharma, S. P. (2011). Ecological and environmental impact of tourism. Kanishka.
Chicago Edition CitationKaushal, Prerna, and Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. New Delhi: Kanishka, 2011.
Deismireacht MLAKaushal, Prerna, and Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. Kanishka, 2011.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.