Rahmayanti, B.F. et al. 2021. Physicochemical Properties Of Used Cooking Oil Purified Using Shallot (Allium Cepa L.) Pell Adsorbent. Journal of Science and Science Education. 2, 2 (Oct. 2021), 84–90. DOI:https://doi.org/10.29303/jossed.v2i2.920.