(1994). Operation and maintenance of Urban water supply and sanitation systems: A guide for managers. World Health Organisation.
استشهاد بنمط شيكاغوOperation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Geneva: World Health Organisation, 1994.
MLA استشهادOperation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. World Health Organisation, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.