Wellinger, A., Murphy, J., & Baxter, D. (2013). The biogas handbook: Science, production and applications. Woodhead Publishing.
Lua i Stíl Chicago (17ú heag.)Wellinger, A., Jerry Murphy, agus David Baxter. The Biogas Handbook: Science, Production and Applications. Oxford: Woodhead Publishing, 2013.
Lua MLA (9ú heag.)Wellinger, A., et al. The Biogas Handbook: Science, Production and Applications. Woodhead Publishing, 2013.
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