ProQuest (Firm). (2011). Main aggregates. OECD.
Chicago-čujuhus (17. p.)ProQuest (Firm). Main Aggregates. [Paris, France]: OECD, 2011.
MLA-čujuhus (9. p.)ProQuest (Firm). Main Aggregates. OECD, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.