Kaushal, P., & Sharma, S. P. (2011). Ecological and environmental impact of tourism. Kanishka.
Chicago-стиль цитированияKaushal, Prerna, and Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. New Delhi: Kanishka, 2011.
MLA-цитированиеKaushal, Prerna, and Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. Kanishka, 2011.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.