Br., Sitepu Nadroh. “In Vitro Test of Antibacterial Ethanol Extract, N-Hexane Fraction and Ethyl Acetate Fraction of Sungkai Leaf (Peronema Cenescens) Against Salmonella Typhi”. Asian Journal of Pharmaceutical Research and Development, vol. 8, no. 3, June 2020, pp. 59-61, doi:10.22270/ajprd.v8i3.757.