World Energy Council. 2010 survey of energy resources.
Chicago-čujuhus (17. p.)World Energy Council. 2010 Survey of Energy Resources.
MLA-čujuhus (9. p.)World Energy Council. 2010 Survey of Energy Resources.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.