Mieta Widya Ramadhani, Faisal, Ahmad Syauqi. Pengaruh Konsentrasi Ekstrak Daun Sirih Hitam (Piper betle var nigra) Terhadap Zona Hambat Bakteri Salmonella typhi dan Escherichia coli : Concentration Effect of Black Betel Leaf Extract (Piper betle var nigra) on the Inhibition Zone of Salmonella typhi and Escherichia coli Bacteria . J.KnownNat. [Internet]. 2025 Jul. 26 [cited 2026 Jul. 21];8(1):56-64. Available from: https://knownnat.unisma.ac.id/index.php/knownnat/article/view/18830