Cita APA (7th ed.)
Organisation for economic co-operation and development. (1999). Energy the next fifty years. OECD.
Cita Chicago (17th ed.)
Organisation for economic co-operation and development. Energy the Next Fifty Years. France: OECD, 1999.
Cita MLA (9th ed.)
Organisation for economic co-operation and development. Energy the Next Fifty Years. OECD, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.