P. A. Zaitun Hasibuan and Mardiana, “Antioxidant Activity of n-Hexane, Ethyl Acetate and Ethanol Extract from Lakoocha Leaves (Artocarpus lacucha Buch.-Ham) using DPPH Method”, idjpcr, vol. 1, no. 2, pp. 41-47, Dec. 2018.