Kaushal, P., & Sharma, S. P. (2011). Ecological and environmental impact of tourism. Kanishka.
استشهاد بنمط شيكاغوKaushal, Prerna, و Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. New Delhi: Kanishka, 2011.
MLA استشهادKaushal, Prerna, و Shashi Prabha Sharma. Ecological and Environmental Impact of Tourism. Kanishka, 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.