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Dyfyniad Arddull Chicagothe World Bank. Doing Business 2007: How to Reform. Washington: World Bank Group, 2007.
Dyfyniad MLAthe World Bank. Doing Business 2007: How to Reform. World Bank Group, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.