Nasution, Azlaini, Isna Wardaniati, and Sintia Lestari. 2022. “Antibacterial Activity of Edible Film With the Addition of Betel Leaf Extract (Piper Betle) Againts Streptococcus Mutans”. JPK : Jurnal Proteksi Kesehatan 11 (1), 12-16. https://doi.org/10.36929/jpk.v11i1.465.