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Dyfyniad Arddull ChicagoThe Survey of Adult Skills: Reader's Companion. Third edition. Paris, France: Organisation for Economic Co-Operation and Development, 2019.
Dyfyniad MLAThe Survey of Adult Skills: Reader's Companion. Third edition. Organisation for Economic Co-Operation and Development, 2019.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.