एपीए उद्धरण

Joseph, K. (2004). Essentials of environmental studies. Pearson.

शिकागो स्टाइल उद्धरण

Joseph, Kurian. Essentials of Environmental Studies. New Delhi: Pearson, 2004.

एमएलए उद्धरण

Joseph, Kurian. Essentials of Environmental Studies. Pearson, 2004.