Fitria, D. A., A. S. Daulay, R. Ridwanto, and H. M. Nasution. “Determination of Catechin Content and Antioxidant Activity of Brewed and Ethanolic Extracts of Cacao Beans (Theobroma Cacao L.) Using Uv-Vis Spectrophotometry”. Journal of Pharmaceutical and Sciences, vol. 9, no. 3, July 2026, pp. 2349-61, doi:10.36490/journal-jps.com.v9i3.1763.