Mubarokah N Dewi. “ECONOMIC FEASIBILITY STUDY BIOGAS POWER PLANT AT 80 TON HOUR PALM OIL MILL”. International Journal of Innovations in Engineering Research and Technology 7, no. 06 (January 24, 2021): 43–48. Accessed July 31, 2025. https://repo.ijiert.org/index.php/ijiert/article/view/316.