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.