D. I. P. P, S. I. G, and B. P. A. A, “ANALYSIS OF TOTAL FLAVONOID LEVELS OF ETHANOL EXTRACT (Cinnamon (Cinnamomum burmanii Blume) LEAVES WITH UV-VIS SPECTROPHOTOMETRY METHOD”, J. IPI, vol. 9, no. 3, pp. 115–120, Oct. 2021.