Cita APA (7th ed.)
(2014). Natural gas information: 2014 with 2013 data. International Energy Agency.
Cita Chicago (17th ed.)
Natural Gas Information: 2014 with 2013 Data. Paris, France: International Energy Agency, 2014.
Cita MLA (9th ed.)
Natural Gas Information: 2014 with 2013 Data. International Energy Agency, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.