NasutionA., WardaniatiI., and LestariS. “Antibacterial Activity of Edible Film With the Addition of Betel Leaf Extract (Piper Betle) Againts Streptococcus Mutans”. JPK : Jurnal Proteksi Kesehatan, Vol. 11, no. 1, July 2022, pp. 12-16, doi:10.36929/jpk.v11i1.465.