Organisation for Economic Co-operation and Development, Programme for International Student Assessment, & ProQuest (Firm). (2009). PISA 2009 assessment framework: Key competencies in reading, mathematics and science. OECD.
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Chicago Style (17th ed.) Zitazioa
Organisation for Economic Co-operation and Development, Programme for International Student Assessment, eta ProQuest (Firm). PISA 2009 Assessment Framework: Key Competencies in Reading, Mathematics and Science. Paris: OECD, 2009.
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MLA (9th ed.) Zitazioa
Organisation for Economic Co-operation and Development, et al. PISA 2009 Assessment Framework: Key Competencies in Reading, Mathematics and Science. OECD, 2009.
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