Organisation for Economic Co-operation and Development & ProQuest (Firm). (2009). Green at fifteen?: How 15-year-olds perform in environmental science and geoscience in PISA 2006. OECD.
Chicago-čujuhus (17. p.)Organisation for Economic Co-operation and Development juo ProQuest (Firm). Green at Fifteen?: How 15-year-olds Perform in Environmental Science and Geoscience in PISA 2006. Paris: OECD, 2009.
MLA-čujuhus (9. p.)Organisation for Economic Co-operation and Development juo ProQuest (Firm). Green at Fifteen?: How 15-year-olds Perform in Environmental Science and Geoscience in PISA 2006. OECD, 2009.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.