G. Samodra and L. N. Azizah, “ANALYSIS ANTIOXIDANT ACTIVITY AND TOTAL FLAVONOID CONTENT COMBINATION OF ETHANOL EXTRACT OF KENCUR RHIZOME (Kaempferiae Galanga L.) AND TAPAK DARA LEAF (Catharanthus Roseus) USING DPPH METHOD: ANTIOXIDANT ACTIVITY”, ijhsrd, vol. 5, no. 2, pp. 128–138, Dec. 2023.