YouTube. Partial Upgrading of Heavy Oil in Canada.
Chicago-čujuhus (17. p.)YouTube. Partial Upgrading of Heavy Oil in Canada.
MLA-čujuhus (9. p.)YouTube. Partial Upgrading of Heavy Oil in Canada.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.