Hulau, Melisa, Nurillahi Febria Leswana, and Risny Oklyan. “Analysis of Salicylic Acid Levels in Anti-Acne Facial Serums Circulating Online in Samarinda City by UV-Visible Spectrophotometric Method”. PHARMADEMICA : Jurnal Kefarmasian dan Gizi 6, no. 1 (September 14, 2026): 38–53. Accessed September 15, 2026. https://jurnal.poltekkespim.ac.id/index.php/pharmademica/article/view/89.