एपीए उद्धरण

Hussen, . A. M. (1999). Principles of Environmental Economics.

शिकागो स्टाइल उद्धरण

Hussen, Ahmed M. Principles of Environmental Economics. London, Routledge, 1999.

एमएलए उद्धरण

Hussen, Ahmed M. Principles of Environmental Economics. 1999.