Rohmatin, S. L., A. . . Sakufa, and R. . Widiarini. “The Effectiveness of Giving 25% Green Betel Leaf Extract Formula (Piper Betle) in Reducing Germ Numbers on the Emergency Room Floor of RSU "X&Quot; Ponorogo Regency”. Journal of Comprehensive Science (JCS), vol. 3, no. 9, Sept. 2024, pp. 4421-33, doi:10.59188/jcs.v3i9.1087.