Cita APA (7th ed.)

Hussen, A. M. (2004). Principles of environmental economics. Routledge.

Cita Chicago (17th ed.)

Hussen, Ahmed M. Principles of Environmental Economics. London: Routledge, 2004.

Cita MLA (9th ed.)

Hussen, Ahmed M. Principles of Environmental Economics. Routledge, 2004.