Abidin, Zainal. “ENERGY MANAGEMENT HYBRID BIOGAS AND SURYA ENERGY IN ELECTRICAL POWER SUPPLY OF LIVESTOCK INDUSTRY”. Jurnal Ecotipe (Electronic, Control, Telecommunication, Information, and Power Engineering) 2, no. 2 (October 27, 2015): 30-36. Accessed May 17, 2024. https://ecotipe.ubb.ac.id/index.php/ecotipe/article/view/38.