Rahmayanti, Baiq Fitri, Yudin Citriadin, Sulistiyana Sulistiyana, Azlan Kamari, and Ali Al-Mokaram. 2021. “Physicochemical Properties Of Used Cooking Oil Purified Using Shallot (Allium Cepa L.) Pell Adsorbent”. Journal of Science and Science Education 2 (2):84-90. https://doi.org/10.29303/jossed.v2i2.920.