Dyfyniad APA

Levin, B. (2011). WTI and Brent Benchmarks: The relative value of crude oil between North America and Europe. Oxford Institute for Energy Studies.

Dyfyniad Arddull Chicago

Levin, B. WTI and Brent Benchmarks: The Relative Value of Crude Oil Between North America and Europe. Oxford Institute for Energy Studies, 2011.

Dyfyniad MLA

Levin, B. WTI and Brent Benchmarks: The Relative Value of Crude Oil Between North America and Europe. Oxford Institute for Energy Studies, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.