Prasetiyo, Andri, Lungguk Hutagaol, and Lidya Luziana. “Formulation of Transparent Solid Soap from Palm Kernel Oil”. Jurnal Jamu Indonesia 5, no. 2 (July 7, 2020): 39–44. Accessed June 7, 2023. http://jamu.journal.ipb.ac.id/index.php/JJI/article/view/159.