World Health organization. (2006). Guidelines for drinking - water quality: Recommendations. World Health Organization.
Chicago-Zitierstil (17. Ausg.)World Health organization. Guidelines for Drinking - Water Quality: Recommendations. Geneva: World Health Organization, 2006.
MLA-Zitierstil (8. Ausg.)World Health organization. Guidelines for Drinking - Water Quality: Recommendations. World Health Organization, 2006.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.