World Health Organization. (1993). 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, 1993.
MLA (8e ed.) BronvermeldingWorld Health Organization. Guidelines for Drinking - Water Quality: Recommendations. World Health Organization, 1993.
Let op: Deze citaties zijn niet altijd 100% accuraat.