Haesti Sembiring, and Riyanto Suprawihadi. “Cabbage Waste As Raw Material for Biogas Production With Water and Chicken Manure Activator”. Jurnal Multidisiplin Madani 3, no. 6 (June 30, 2023): 1257–1262. Accessed July 1, 2026. https://journal.formosapublisher.org/index.php/mudima/article/view/4552.