APA (7e ed.) Bronvermelding

Não informado. (1964). Highlights. Water Pollution Control Federation.

Chicago (17e ed.) Bronvermelding

Não informado. Highlights. Washington: Water Pollution Control Federation, 1964.

MLA (8e ed.) Bronvermelding

Não informado. Highlights. Water Pollution Control Federation, 1964.

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