Bali, S., and L. Fernenda. “Determination of Salicylic Acid Levels in Anti-Acne Creams Sold in Online Shops and Pharmacies Using UV-Vis Spectrophotometric and Alkalimetric Methods”. Jurnal Ilmu Kesehatan Abdurrab, vol. 2, no. 1, Mar. 2024, pp. 27-33, https://jurnal.univrab.ac.id/index.php/jika/article/view/5008.