World Health Organization. (2011). Guidelines for drinking-water quality (4th.). World Health Organization.
Chicago-Zitierstil (17. Ausg.)World Health Organization. Guidelines for Drinking-water Quality. 4th. Geneva, Switzerland: World Health Organization, 2011.
MLA-Zitierstil (8. Ausg.)World Health Organization. Guidelines for Drinking-water Quality. 4th. World Health Organization, 2011.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.