“Antibacterial Activity of Edible Film With the Addition of Betel Leaf Extract (Piper Betle) Againts Streptococcus Mutans”. JPK : Jurnal Proteksi Kesehatan 11, no. 1 (July 4, 2022): 12–16. Accessed January 19, 2026. https://jurnal.pkr.ac.id/JPK/article/view/465.