World Health Organization. (1984). Guide Lines for Dringking - Water Quality. World Health Organisation.
استشهاد بنمط شيكاغوWorld Health Organization. Guide Lines for Dringking - Water Quality. Geneva: World Health Organisation, 1984.
MLA استشهادWorld Health Organization. Guide Lines for Dringking - Water Quality. World Health Organisation, 1984.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.