World Health Organization. (1997). Guidelines for drinking - water quality: Surveillance and control of community supplies. World Health Organization.
Chicago (17e ed.) BronvermeldingWorld Health Organization. Guidelines for Drinking - Water Quality: Surveillance and Control of Community Supplies. Geneva: World Health Organization, 1997.
MLA (8e ed.) BronvermeldingWorld Health Organization. Guidelines for Drinking - Water Quality: Surveillance and Control of Community Supplies. World Health Organization, 1997.
Let op: Deze citaties zijn niet altijd 100% accuraat.