Chandra, M.A., Kuncahyo, I. and Indrayati, A. 2022. Optimization of Quercetin Gel Formulation using Factorial Design Method and Antibacterial Test against Propionibacterium acnes. Borneo Journal of Pharmacy. 5, 2 (May 2022), 126–135. DOI:https://doi.org/10.33084/bjop.v5i2.3321.