Levin, B. (2011). WTI and Brent Benchmarks: The relative value of crude oil between North America and Europe. Oxford Institute for Energy Studies.
芝加哥风格引文Levin, B. WTI and Brent Benchmarks: The Relative Value of Crude Oil Between North America and Europe. Oxford Institute for Energy Studies, 2011.
MLA引文Levin, B. WTI and Brent Benchmarks: The Relative Value of Crude Oil Between North America and Europe. Oxford Institute for Energy Studies, 2011.
警告：这些引文格式不一定是100％准确.