(1994). Operation and maintenance of water supply and sanitaion systems: Case studies. Genava: World Health Organization (WHO).
শিকাগো স্টাইলে সাইটেশনOperation and Maintenance of Water Supply and Sanitaion Systems: Case Studies. Genava: World Health Organization (WHO), 1994.
এমএলএ সাইটেশনOperation and Maintenance of Water Supply and Sanitaion Systems: Case Studies. Genava: World Health Organization (WHO), 1994.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.