Ehrhardt, D. (2007). Economic regulation of urban water and sanitation services: Some practical lessons. World Bank.
Citace podle Chicago (17th ed.)Ehrhardt, David. Economic Regulation of Urban Water and Sanitation Services: Some Practical Lessons. Washington, D.C: World Bank, 2007.
Citace podle MLA (9th ed.)Ehrhardt, David. Economic Regulation of Urban Water and Sanitation Services: Some Practical Lessons. World Bank, 2007.
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