OECD Programme for International Student Assessment. (2009). PISA 2009 assessment framework: Key competencies in reading, mathematics and science. OECD.
Chicago-Zitierstil (17. Ausg.)OECD Programme for International Student Assessment. PISA 2009 Assessment Framework: Key Competencies in Reading, Mathematics and Science. Paris: OECD, 2009.
MLA-Zitierstil (9. Ausg.)OECD Programme for International Student Assessment. PISA 2009 Assessment Framework: Key Competencies in Reading, Mathematics and Science. OECD, 2009.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.