Cofnodi Dyfyniadau
Dyfyniad APA
(2014). World development indicators, 2014. The World Bank.
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Dyfyniad Arddull Chicago
World Development Indicators, 2014. Washington, District of Columbia: The World Bank, 2014.
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Dyfyniad MLA
World Development Indicators, 2014. The World Bank, 2014.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.