Sturm, F. J. (1997). Trading natural gas: Cash futures options and swaps. PennWell Corp.
芝加哥风格引文Sturm, Fletcher J. Trading Natural Gas: Cash Futures Options and Swaps. Tulsa: PennWell Corp, 1997.
MLA引文Sturm, Fletcher J. Trading Natural Gas: Cash Futures Options and Swaps. PennWell Corp, 1997.
警告：这些引文格式不一定是100％准确.