UNDP-World Bank Water and Sanitation Program & Whittington, D. (1992). Household demand for improved sanitation services: A case study of Kumasi, Ghana. UNDP-World Bank Water and Sanitation Program, World Bank.
Chicago-viite (17. p.)UNDP-World Bank Water and Sanitation Program ja Dale Whittington. Household Demand for Improved Sanitation Services: A Case Study of Kumasi, Ghana. Washington, DC: UNDP-World Bank Water and Sanitation Program, World Bank, 1992.
MLA-viite (9. p.)UNDP-World Bank Water and Sanitation Program ja Dale Whittington. Household Demand for Improved Sanitation Services: A Case Study of Kumasi, Ghana. UNDP-World Bank Water and Sanitation Program, World Bank, 1992.
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