(2014). Natural gas information: 2014 with 2013 data. International Energy Agency.
Čikaški stil citiranja (17. izdanje)Natural Gas Information: 2014 with 2013 Data. Paris, France: International Energy Agency, 2014.
MLA način citiranja (9. izdanje)Natural Gas Information: 2014 with 2013 Data. International Energy Agency, 2014.
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