APA
Rajagopalan, Rajagopalan, . (2011). Environmental studies. New Delhi: Oxford University Press.
Chicago
Rajagopalan, Rajagopalan, . 2011. Environmental studies. New Delhi: Oxford University Press.
Harvard
Rajagopalan, Rajagopalan, . (2011). Environmental studies. New Delhi: Oxford University Press.
MLA
Rajagopalan, Rajagopalan, . Environmental studies. New Delhi: Oxford University Press. 2011.