Dyfyniad APA

Kaushal, P., & Sharma, S. P. (2011). Ecological and environmental impact of tourism. Kanishka.

Dyfyniad Arddull Chicago

Kaushal, Prerna, and Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. New Delhi: Kanishka, 2011.

Dyfyniad MLA

Kaushal, Prerna, and Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. Kanishka, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.