एपीए उद्धरण

Hussen, A. M. (2000). Principles of environmental economics: Economics, ecology and public policy. London: Routledge.

शिकागो स्टाइल उद्धरण

Hussen, Ahmed M. Principles of Environmental Economics: Economics, Ecology and Public Policy. London: Routledge, 2000.

एमएलए उद्धरण

Hussen, Ahmed M. Principles of Environmental Economics: Economics, Ecology and Public Policy. London: Routledge, 2000.