Tirono, Mokhamad. “Effects of Exposure to Ultrasonic Waves on Extraction of Evaporation Methods on The Anthocyanin Content of Green Betal and Basil Leaves”. Jurnal Penelitian Pendidikan IPA, vol. 8, no. 2, Apr. 2022, pp. 599-04, doi:10.29303/jppipa.v8i2.1368.