World Health Organization. (2011). Guidelines for drinking-water quality (4th.). World Health Organization.
Chicago-referens (17:e uppl.)World Health Organization. Guidelines for Drinking-water Quality. 4th. Geneva, Switzerland: World Health Organization, 2011.
MLA-referens (8:e uppl.)World Health Organization. Guidelines for Drinking-water Quality. 4th. World Health Organization, 2011.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.