World Health organization. (2006). Guidelines for drinking - water quality: Recommendations. World Health Organization.
Chicago (17e ed.) BronvermeldingWorld Health organization. Guidelines for Drinking - Water Quality: Recommendations. Geneva: World Health Organization, 2006.
MLA (8e ed.) BronvermeldingWorld Health organization. Guidelines for Drinking - Water Quality: Recommendations. World Health Organization, 2006.
Let op: Deze citaties zijn niet altijd 100% accuraat.