Fadilla, Audia, Alya Arahma, and Enni Halimatusa’diyah Pakpahan. “Cara Pengelolaan Limbah Kopi”. El-Mujtama: Jurnal Pengabdian Masyarakat  4, no. 2 (January 12, 2024): 791–798 . Accessed June 1, 2026. https://journal-laaroiba.com/ojs/index.php/elmujtama/article/view/899.