(1994). Operation and maintenance of Urban water supply and sanitation systems: A guide for managers. World Health Organisation.
শিকাগো স্টাইলে সাইটেশনOperation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. Geneva: World Health Organisation, 1994.
এমএলএ সাইটেশনOperation and Maintenance of Urban Water Supply and Sanitation Systems: A Guide for Managers. World Health Organisation, 1994.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.