Ola, Pius, and Elisabeth Taus. “USE OF SEQUENT ADSORPTION WITH ACTIVATED NATURAL ZEOLITE AND ACTIVATED CHARCOAL AS ADSORBENT TO IMPROVE THE QUALITY OF WASTE COOKING OIL”. Chemistry Notes 2, no. 2 (December 2, 2020): 11-20. Accessed April 8, 2025. https://ejurnal.undana.ac.id/index.php/CN/article/view/3268.