kaushik, a., & Kaushik, C. P. (2014). perspectives in environmental studies. New age international limited.
Citazione stile Chigago Style (17a edizione)kaushik, anubha, e C P. Kaushik. Perspectives in Environmental Studies. New delhi: New age international limited, 2014.
Citatione MLA (9a ed.)kaushik, anubha, e C P. Kaushik. Perspectives in Environmental Studies. New age international limited, 2014.