Faridah BD, F. B.; Saputri, L. A.; Fitriah, I. P.; Rahmawati, L.; Oktavia, N. S.; Armin, F. Formulation and Evaluation of Antibacterial Activity of Hand Sanitizers Containing Red Betel (Piper Crocatum) and White Galangal (Alpinia Galanga) Extract. medisians 2024, 22, 20-26.