World Health Organization World Plumbing Council. (2006). Health aspects of plumbing. World health Organization.
Chicago Style (17th ed.) CitationWorld Health Organization World Plumbing Council. Health Aspects of Plumbing. Geneva: World health Organization, 2006.
ציטוט MLAWorld Health Organization World Plumbing Council. Health Aspects of Plumbing. World health Organization, 2006.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.