FERDIAN, Muh. Agus, Randhiki Gusti PERDANA, and Poegoeh Prasetyo RAHARDJO. “Refinery Technology of Used Cooking Oil by Utilizing Coffee Dregs and Sugar Cane Bagasse As Raw Materials for Making Antiseptic Transparent Soap of Guava Leaf Extract”. International Journal of Agriculture, Environment and Food Sciences 7, no. 1 (March 27, 2023). Accessed December 9, 2023. http://jaefs.com/index.php/jaefs/article/view/2.