APA (7e ed.) Bronvermelding

Não informado. (1988). Federation Highlights. Water Pollution Control Federation.

Chicago (17e ed.) Bronvermelding

Não informado. Federation Highlights. Alexandria, Va: Water Pollution Control Federation, 1988.

MLA (8e ed.) Bronvermelding

Não informado. Federation Highlights. Water Pollution Control Federation, 1988.

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