Achmad Qodim Syafaatullah, Variyana, Y., Ni’matur Rohmah, Iid Mufaidah, & Ayu Qurota A’yun. (2021). Optimization of Ultrasound-Assisted Extraction Parameters from Indigofera Tinctoria L using Response Surface Methodology . Journal of Research and Technology, 7(2), 175–186. https://doi.org/10.55732/jrt.v7i2.450