World Bank. (2013). Africa development indicators 2012/2013. The World Bank.
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Dyfyniad Arddull Chicago
World Bank. Africa Development Indicators 2012/2013. Washington, DC: The World Bank, 2013.
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Dyfyniad MLA
World Bank. Africa Development Indicators 2012/2013. The World Bank, 2013.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.