Melanie, C. F.; Dalimunthe, G. I.; Ridwanto; Rahman, F. Analysis of Vitamin C in White Dragon Fruit (Hylocereus Undatus) and Red Dragon Fruit (hylocereus Polyrhizus) With Comparison of Uv Spectrophotometry and Iodimetric Titration Methods. JPS 2023, 6, 1313-1321.