(1994). Operation and maintenance of Urban water supply and sanitation systems: A guide for managers. World Health Organisation.
Chicago Edition CitationOperation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Geneva: World Health Organisation, 1994.
ציטוט MLAOperation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. World Health Organisation, 1994.
אזהרה: ציטוטים אלה לעיתים לא מדויקים ב 100%.