APA (7e ed.) Bronvermelding

National Planning Institute. (2007). The virtual water concept. National Planning Institute.

Chicago (17e ed.) Bronvermelding

National Planning Institute. The Virtual Water Concept. cairo.: National Planning Institute, 2007.

MLA (9e ed.) Bronvermelding

National Planning Institute. The Virtual Water Concept. National Planning Institute, 2007.

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