APA-referens

Hussen, A. (2013). Principles of environmental economics and sustainability: An integrated economic and ecological approach (3rd ed.). Routledge.

Chicago-stil citat

Hussen, Ahmed. Principles of Environmental Economics and Sustainability: An Integrated Economic and Ecological Approach. 3rd ed. Oxon: Routledge, 2013.

MLA-referens

Hussen, Ahmed. Principles of Environmental Economics and Sustainability: An Integrated Economic and Ecological Approach. 3rd ed. Routledge, 2013.