एपीए उद्धरण

Singh,R.P, & Zubairul Islam. (2012). Environmental studies. Concept Publishing Co.Pvt Ltd.

शिकागो स्टाइल उद्धरण

Singh,R.P, और Zubairul Islam. Environmental Studies. New Delhi: Concept Publishing Co.Pvt Ltd, 2012.

एमएलए उद्धरण

Singh,R.P, और Zubairul Islam. Environmental Studies. Concept Publishing Co.Pvt Ltd, 2012.