Andieni , H. P., & Kusumowati, I. T. D. (2026). Determination of Retinoic Acid Content in Anti-Acne Creams in Blora Regency Using UV Spectrophotometry. Journal of Pharmaceutical and Sciences, 9(1), 327–335. https://doi.org/10.36490/journal-jps.com.v9i1.1243