Tandi, Joni, Ni P. I. Riani, Tien W. Handayani, and Maria Kanan. “Determination of Secondary Metabolites and Antioxidant Activity of Robusta Coffee Bean Ethanol Extract by UV-Vis Spectrophotometry”. Jurnal Akademika Kimia 12, no. 1 (July 30, 2024): 58-64. Accessed January 15, 2025. https://jurnalfkipuntad.com/index.php/jak/article/view/3406.