Long, D. (1991). European gas oil markets: Price relationships, hedging and efficiency. Oxford Institute for Energy Studies.
Cita Chicago (17th ed.)Long, D. European Gas Oil Markets: Price Relationships, Hedging and Efficiency. Oxford Institute for Energy Studies, 1991.
Cita MLA (9th ed.)Long, D. European Gas Oil Markets: Price Relationships, Hedging and Efficiency. Oxford Institute for Energy Studies, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.