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Dyfyniad Arddull ChicagoOrganisation for Economic Co-operation and Development and ProQuest (Firm). OECD Economic Surveys. [Paris]: Organisation for Economic Co-operation and Development, 2009.
Dyfyniad MLAOrganisation for Economic Co-operation and Development and ProQuest (Firm). OECD Economic Surveys. Organisation for Economic Co-operation and Development, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.