World Health Organization. (1984). Guide Lines for Dringking - Water Quality. World Health Organisation.
Chicago Edition CitationWorld Health Organization. Guide Lines for Dringking - Water Quality. Geneva: World Health Organisation, 1984.
ציטוט MLAWorld Health Organization. Guide Lines for Dringking - Water Quality. World Health Organisation, 1984.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.