Leffler, W. L., & Womack, K. (2014). Natural gas liquids: A nontechnical guide. PennWell Corporation.
Chicago Style (17th ed.) CitationLeffler, William L., and Karla Womack. Natural Gas Liquids: A Nontechnical Guide. Tulsa, Oklahoma: PennWell Corporation, 2014.
MLA (9th ed.) CitationLeffler, William L., and Karla Womack. Natural Gas Liquids: A Nontechnical Guide. PennWell Corporation, 2014.
Warning: These citations may not always be 100% accurate.