SALSABILA, Luvena; PRADNYA, Irene Nindita; MAULANA, Ivan; DIANA, Savira Rahma; AMALIA, Annisa. Formulation of Solid Soap Preparation from Used Cooking Oils with Pineapple Peel Eco-enzyme. Hydrogen: Jurnal Kependidikan Kimia, [S. l.], v. 13, n. 3, p. 678–687, 2025. DOI: 10.33394/hjkk.v13i3.15337. Disponível em: https://e-journal3.undikma.ac.id/index.php/hydrogen/article/view/15337. Acesso em: 15 aug. 2025.