APA aipamena

OECD. (2016). PISA 2015 Results. OECD.

Chicago Style aipamena

OECD. PISA 2015 Results. OECD, 2016.

MLA aipamena

OECD. PISA 2015 Results. OECD, 2016.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.