APA (7e ed.) Bronvermelding

World Resources Institute. A Guide to world resources 2002-2004: Desicions for the earth balance, voice and power. S.n.

Chicago (17e ed.) Bronvermelding

World Resources Institute. A Guide to World Resources 2002-2004: Desicions for the Earth Balance, Voice and Power. Washington, D.C.: S.n.

MLA (9e ed.) Bronvermelding

World Resources Institute. A Guide to World Resources 2002-2004: Desicions for the Earth Balance, Voice and Power. S.n.