Organisation for Economic Co-operation and Development & ProQuest (Firm). (2009). Green at fifteen?: How 15-year-olds perform in environmental science and geoscience in PISA 2006. OECD.
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Dyfyniad Arddull Chicago
Organisation for Economic Co-operation and Development and ProQuest (Firm). Green at Fifteen?: How 15-year-olds Perform in Environmental Science and Geoscience in PISA 2006. Paris: OECD, 2009.
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Dyfyniad MLA
Organisation for Economic Co-operation and Development and ProQuest (Firm). Green at Fifteen?: How 15-year-olds Perform in Environmental Science and Geoscience in PISA 2006. OECD, 2009.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.