Rohani, S.; Martha, F. R.; Mundijo, T.; Yesi Astri; Zilda, M.; Melianti, A. Spectroscopic Characterization of Rosella Flower Extract (Hibiscus Sabdariffa L.) and Its Antibacterial Activity Against Enterobacter Aerogenes in Suspected Typhoid Cases. IJMLST 2025, 7, 12-22.