APA (7e ed.) Bronvermelding

Não informado. (1982). National Water Conditions. U.S. Department of the Interior, Geological Survey.

Chicago (17e ed.) Bronvermelding

Não informado. National Water Conditions. Reston, Va: U.S. Department of the Interior, Geological Survey, 1982.

MLA (8e ed.) Bronvermelding

Não informado. National Water Conditions. U.S. Department of the Interior, Geological Survey, 1982.

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