Lua APA (7ú heag.)

Organisation for Economic Co-operation and Development & ProQuest (Firm). (2013). PISA 2012 assessment and analytical framework. OECD.

Lua i Stíl Chicago (17ú heag.)

Organisation for Economic Co-operation and Development agus ProQuest (Firm). PISA 2012 Assessment and Analytical Framework. Paris: OECD, 2013.

Lua MLA (9ú heag.)

Organisation for Economic Co-operation and Development agus ProQuest (Firm). PISA 2012 Assessment and Analytical Framework. OECD, 2013.

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