Antioxidant Activity of Ethanol Extract Combinations of Jeruk Purut Leaf (Citrus hystrix Dc.) and Jati Belanda Leaf (Guazuma ulmifolia L.). (2018). Journal of Tropical Pharmacy and Chemistry , 4(4), 163-167. https://doi.org/10.30872/j.trop.pharm.chem.v4i4.266