Aryani, Titin, and Isnin Mu’awanah. 2019. “Antioxidant Activity and Vitamin C Levels of Fruit Flesh and Dragon (Hylocereus Costaricensis) Fruit Syrup”. Biomedika 12 (2), 149-57. https://doi.org/https://doi.org/10.31001/biomedika.v12i2.592.