Narsa, Angga Cipta. “Formulation and Stability Tests of Hair Tonic from Oil Palm (Elaeis Guineensis Jacq.) Leaves Extract and Effectiveness in Protecting Hair”. Journal of Tropical Pharmacy and Chemistry 6, no. 2 (December 31, 2022): 144–153. Accessed June 25, 2026. https://jtpc.jurnalfamul.com/index.php/jtpc/article/view/524.