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Dyfyniad Arddull ChicagoWorld Bank. World Development Report 1978-2003: With Selected World Development Indicators 2002. Washington, D.C: World Bank, 2003.
Dyfyniad MLAWorld Bank. World Development Report 1978-2003: With Selected World Development Indicators 2002. World Bank, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.