APA-referens

Covington, G. (2010). International encyclopedia of sustainable development. Apple academic.

Chicago-stil citat

Covington, Gareth. International Encyclopedia of Sustainable Development. Oakville: Apple academic, 2010.

MLA-referens

Covington, Gareth. International Encyclopedia of Sustainable Development. Apple academic, 2010.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.