“OPTIMIZATION OF CONDITION FOR METHYLEN BLUE ADSORPTION USING ACTIVATED COMMERCIAL ZEOLITE”. Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit 23, no. 1 (December 16, 2024): 173–179. Accessed January 3, 2025. https://e-jurnal.atk.ac.id/index.php/bptkspk/article/view/41.