“PENETAPAN KADAR FLAVONOID EKSTRAK ETANOL KULIT BUAH JERUK GERGA LEBONG DENGAN METODE SPEKTROFOTOMETRI UV-VIS: DETERMINATION OF FLAVONOID LEVELS OF ETHANOL EXTRACT OF ORANGE SKIN OF GERGA LEBONG FRUIT WITH UV-VIS SPECTROPHOTOMETRY METHOD”, JPFI, vol. 11, no. 1, pp. 20–23, Jun. 2022.