(2014). Switzerland 2013. OECD.
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Dyfyniad Arddull Chicago
Switzerland 2013. [Paris, France]: OECD, 2014.
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Dyfyniad MLA
Switzerland 2013. OECD, 2014.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.