World Health Organization. (1984). Guide Lines for Dringking - Water Quality. World Health Organisation.
Chicago-stil citatWorld Health Organization. Guide Lines for Dringking - Water Quality. Geneva: World Health Organisation, 1984.
MLA-referensWorld Health Organization. Guide Lines for Dringking - Water Quality. World Health Organisation, 1984.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.