World Bank. (2006). Explanatory notes on key topics in the regulation of water and sanitation services. World Bank.
Chicago-tyylinen lähdeviittausWorld Bank. Explanatory Notes on Key Topics in the Regulation of Water and Sanitation Services. Washington: World Bank, 2006.
MLA-viiteWorld Bank. Explanatory Notes on Key Topics in the Regulation of Water and Sanitation Services. World Bank, 2006.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.