एपीए उद्धरण

Singh,M.P. (2004). Natural Resources and Renewable Energy.

शिकागो स्टाइल उद्धरण

Singh,M.P. Natural Resources and Renewable Energy. New Delhi:A.P.H.Publishing, 2004.

एमएलए उद्धरण

Singh,M.P. Natural Resources and Renewable Energy. 2004.