Sabiti, F. B., Juarti, I. B., & Alfa, Z. S. (2024). Optimization of Facial Toner Preparation of Gotu Kola Leaves (Centella Asiatica) as Anti-Acne with Variations of Polysorbate 20 and Glycerin Using the Simplex Lattice Design Method. Jurnal Farmasi & Sains Indonesia, 7(1), 134-140. https://doi.org/10.52216/jfsi.vol7no1p134-140