Sharma, S. P. (2007). Tourism and environment: Concepts, principles and approaches. Kanishka Publishers, Distributors.
Цитирование в стиле Чикаго (17-е изд.)Sharma, Shashi Prabha. Tourism and Environment: Concepts, Principles and Approaches. New Delhi: Kanishka Publishers, Distributors, 2007.
Цитирование MLA (8-е изд.)Sharma, Shashi Prabha. Tourism and Environment: Concepts, Principles and Approaches. Kanishka Publishers, Distributors, 2007.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.