World Health Organization. (1997). Guidelines for drinking - water quality: Surveillance and control of community supplies. World Health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Guidelines for Drinking - Water Quality: Surveillance and Control of Community Supplies. Geneva: World Health Organization, 1997.
MLA-Zitierstil (8. Ausg.)World Health Organization. Guidelines for Drinking - Water Quality: Surveillance and Control of Community Supplies. World Health Organization, 1997.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.