kaushik, a., & Kaushik, C. P. (2014). perspectives in environmental studies. New age international limited.
Lua i Stíl Chicago (17ú heag.)kaushik, anubha, agus C P. Kaushik. Perspectives in Environmental Studies. New delhi: New age international limited, 2014.
Lua MLA (9ú heag.)kaushik, anubha, agus C P. Kaushik. Perspectives in Environmental Studies. New age international limited, 2014.