Sankar, U. (2001). Environmental economics. Oxford University Press.
Cita Chicago (17th ed.)Sankar, Ulaganathan. Environmental Economics. New Delhi: Oxford University Press, 2001.
Cita MLA (9th ed.)Sankar, Ulaganathan. Environmental Economics. Oxford University Press, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.