Dyfyniad APA

OECD. (2013). PISA 2012 Results: What Makes Schools Successful. OECD.

Dyfyniad Arddull Chicago

OECD. PISA 2012 Results: What Makes Schools Successful. OECD, 2013.

Dyfyniad MLA

OECD. PISA 2012 Results: What Makes Schools Successful. OECD, 2013.

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