Rosalinda , S., Herna Fitriyani, and Efri Mardawati. 2024. “Optimization of Ultrasound Assisted Extraction (UAE) Conditions on Vitamin C from Roselle Flower”. International Journal on Advanced Science, Engineering and Information Technology 14 (1):237-45. https://doi.org/10.18517/ijaseit.14.1.17133.