Wahyudi, Apri, Berlian Sitrous, and Ferdinand Hidayat. 2025. “Kinetic Analysis of Saponification Reaction in Eco-Friendly Soap Production Based on Waste Cooking Oil”. Hydrogen: Jurnal Kependidikan Kimia 13 (3):713-23. https://doi.org/10.33394/hjkk.v13i3.14828.