Putri, Aristha Novyra, Noor Laila, and Dyera Forestryana. 2019. “Formula Optimization of Annona Muricata Folium Ethanolic Extract of Anti Acne Gel Formulation Using Factorial Design Method”. Borneo Journal of Pharmacy 2 (2). Palangka Raya, Indonesia:63-70. https://doi.org/10.33084/bjop.v2i2.981.