Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.