Programme for International Student Assessment & ProQuest (Firm). (2011). PISA 2009 at a glance. OECD.
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Chicago Style (17th ed.) Citation
Programme for International Student Assessment and ProQuest (Firm). PISA 2009 at a Glance. Paris: OECD, 2011.
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ציטוט MLA
Programme for International Student Assessment and ProQuest (Firm). PISA 2009 at a Glance. OECD, 2011.
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