Marlina, Rini, Ade Oktasari, and Rohmatullaili Rohmatullaili. 2022. “Utilization of Adsorbent Cocoa Shell For Purification of Used Cooking Oil”. Stannum : Jurnal Sains Dan Terapan Kimia 4 (1), 6-12. https://doi.org/10.33019/jstk.v4i1.2638.