एपीए उद्धरण

Ulaganathan Sankar. (2001). Environmental Economics. Oxford.

शिकागो स्टाइल उद्धरण

Ulaganathan Sankar. Environmental Economics. New Delhi: Oxford, 2001.

एमएलए उद्धरण

Ulaganathan Sankar. Environmental Economics. Oxford, 2001.