APA-čujuhus (7. p.)
International Energy Agency & ProQuest (Firm). (2011). Natural gas information: 2011 with 2010 data. International Energy Agency.
Chicago-čujuhus (17. p.)
International Energy Agency juo ProQuest (Firm). Natural Gas Information: 2011 with 2010 Data. Paris: International Energy Agency, 2011.
MLA-čujuhus (9. p.)
International Energy Agency juo ProQuest (Firm). Natural Gas Information: 2011 with 2010 Data. International Energy Agency, 2011.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.