Haidar Sitie Rafidah, Hafiizh Prasetia, and Asep Saefumillah. “Adsorption Study of Methylene Blue and Methyl Red on Activated Carbon from Silver Composite Using the Extract of Spent Coffee Grounds”. Jurnal Sains Materi Indonesia 25, no. 2 (May 4, 2024): 77–84. Accessed December 21, 2024. https://ejournal.brin.go.id/jsmi/article/view/924.