APA (7e ed.) Bronvermelding

The Economist Intelligence Unit. (1999). Best practices: Environment. Univerties Press.

Chicago (17e ed.) Bronvermelding

The Economist Intelligence Unit. Best Practices: Environment. India: Univerties Press, 1999.

MLA (8e ed.) Bronvermelding

The Economist Intelligence Unit. Best Practices: Environment. Univerties Press, 1999.

Let op: Deze citaties zijn niet altijd 100% accuraat.