Ahmad , R., and N. Ainiyah. “Optimization of Formulation and Physical Test of Toner Preparation from Lavender Essential Oil (Lavandula Angustifolia l.) As Anti-Acne”. Journal of Pharmaceutical and Sciences, vol. 8, no. 1, Mar. 2025, pp. 367-7, doi:10.36490/journal-jps.com.v8i1.381.