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Dyfyniad Arddull ChicagoInternational Monetary Fund. Republica Democratica De Sao Tome E Principe: Consulta Do Artigo IV De 2011. Washington, D.C.: International Monetary Fund, 2012.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.