Wahyuni, S., H. Sutjahjo, S., Purwanto, Y.A., M. Fuah, A. and Kurniawan, R. 2019. The Model of Biogas Utilization from Livestock Manure Using Farmer Group Approach to Meet Alternative Energy at Household Scale. International Journal of Sciences: Basic and Applied Research (IJSBAR). 43, 1 (Jan. 2019), 57–66.