Sri Wahdaningsih, Sugeng Riyanto, & Retno Murwanti. (2017). The radical scavenging activity of 2-2’ diphenyl -1- picrylhydrazil (DPPH) on the methanol extracts and Ethyl acetate fractions of red dragon fruit peel (Hylocereus polyrhizus (F.A.C.Weber) Britton dan Rose). International Journal of Phytomedicine, 9(1), 79–82. Retrieved from https://ijp.arjournals.org/index.php/ijp/article/view/515