U.S. Energy Information Administration. Review of emerging resources , U.S. shale gas and shale oil plays.
芝加哥风格引文U.S. Energy Information Administration. Review of Emerging Resources , U.S. Shale Gas and Shale Oil Plays.
MLA引文U.S. Energy Information Administration. Review of Emerging Resources , U.S. Shale Gas and Shale Oil Plays.
警告：这些引文格式不一定是100％准确.