World Health organization International water and Sanitation centre Water Supply and Sanitation coolaborative Council. (2000). Operation and maintenance of rural water supply and sanitation systems: A training package for managers and planners. World Health Organization.
Cytowanie według stylu Chicago (wyd. 17)World Health organization International water and Sanitation centre Water Supply and Sanitation coolaborative Council. Operation and Maintenance of Rural Water Supply and Sanitation Systems: A Training Package for Managers and Planners. Geneva: World Health Organization, 2000.
Cytowanie według stylu MLA (wyd. 8)World Health organization International water and Sanitation centre Water Supply and Sanitation coolaborative Council. Operation and Maintenance of Rural Water Supply and Sanitation Systems: A Training Package for Managers and Planners. World Health Organization, 2000.