APA (7e ed.) Bronvermelding

Não informado. (1975). Water international. International Water Resources Association.

Chicago (17e ed.) Bronvermelding

Não informado. Water International. Urbana, Ill: International Water Resources Association, 1975.

MLA (8e ed.) Bronvermelding

Não informado. Water International. International Water Resources Association, 1975.

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