Rupa, N.F. et al. 2023. Validasi Metode dan Penetapan Kadar Kafein Menggunakan Spektrofotometri UV-Vis: Validation of the Method and Determination of Caffeine Levels Using UV-Vis Spectrophotometry. Proceeding of Mulawarman Pharmaceuticals Conferences. 18, 1 (Dec. 2023), 109–115. DOI:https://doi.org/10.25026/mpc.v18i1.713.