World Health Organization. (1984). Guide Lines for Dringking - Water Quality. World Health Organisation.
Chicago Style citaatWorld Health Organization. Guide Lines for Dringking - Water Quality. Geneva: World Health Organisation, 1984.
MLA citatieWorld Health Organization. Guide Lines for Dringking - Water Quality. World Health Organisation, 1984.
Let op: Deze citaties zijn niet altijd 100% accuraat.