International Bank for Reconstruction and Development. (2010). World development indicators 2010. World Bank.
Dyfyniad Arddull ChicagoInternational Bank for Reconstruction and Development. World Development Indicators 2010. Washington, D.C: World Bank, 2010.
Dyfyniad MLAInternational Bank for Reconstruction and Development. World Development Indicators 2010. World Bank, 2010.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.