Batra,Sanjay Kumar & others. (2015). Environmental Studies. Taxmans.
Cita Chicago (17th ed.)Batra,Sanjay Kumar & others. Environmental Studies. New Delhi: Taxmans, 2015.
Cita MLA (9th ed.)Batra,Sanjay Kumar & others. Environmental Studies. Taxmans, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.