Oktavia, S., M. Bahar, S. Wahyuningsih, F. Zulfa, and F. A. Makkiyah. “Antibacterial Activity of Graptophyllum Pictum (L.) Griff Extract Using Variations of Ultrasonic Frequency Against Escherichia Coli”. BIOEDUSCIENCE, vol. 8, no. 2, Aug. 2024, pp. 154-0, doi:10.22236/jbes/14168.