ScienceDirect (Online service), Wellinger, A., Murphy, J., & Baxter, D. (2013). The biogas handbook: Science, production and applications. Woodhead Publishing Limited.
Chicago Style (17th ed.) CitationScienceDirect (Online service), A. Wellinger, Jerry Murphy, and David Baxter. The Biogas Handbook: Science, Production and Applications. Oxford: Woodhead Publishing Limited, 2013.
MLA (9th ed.) CitationScienceDirect (Online service), et al. The Biogas Handbook: Science, Production and Applications. Woodhead Publishing Limited, 2013.
Warning: These citations may not always be 100% accurate.