(1994). Operation and Maintenance of Urban Water Supply and Sanitation Systems A guide for Managers. World Health Organization.
Цитирование в стиле Чикаго (17-е изд.)Operation and Maintenance of Urban Water Supply and Sanitation Systems A Guide for Managers. Ginebra: World Health Organization, 1994.
Цитирование MLA (9-е изд.)Operation and Maintenance of Urban Water Supply and Sanitation Systems A Guide for Managers. World Health Organization, 1994.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.