Cita APA (7th ed.)
(2015). Natural gas information 2015: With 2014 data. OECD : IEA.
Cita Chicago (17th ed.)
Natural Gas Information 2015: With 2014 Data. Paris, France: OECD : IEA, 2015.
Cita MLA (9th ed.)
Natural Gas Information 2015: With 2014 Data. OECD : IEA, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.