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.
Չիկագոյի ոճի (17րդ խմբ.) մեջբերումWorld 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.
MLA (8րդ խմբ.) ՄեջբերումWorld 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.