Faridah BD, F.B. et al. 2024. Formulation and evaluation of antibacterial activity of hand sanitizers containing red betel (Piper crocatum) and white galangal (Alpinia galanga) extract. MEDISAINS: Jurnal Ilmiah Ilmu-Ilmu Kesehatan. 22, 1 (May 2024), 20–26. DOI:https://doi.org/10.30595/medisains.v22i1.21357.