“Phytochemical Assay and Antioxidant Activity Against DPPH of Ethanol Extract from Kenaf Leaf (Hibiscus Cannabinus L.)”. Journal of Tropical Pharmacy and Chemistry , vol. 4, no. 5, June 2019, pp. 203-8, https://doi.org/10.30872/j.trop.pharm.chem.v4i5.273.