Ningtias, S., H. Harjono, C. Kurniawan, and S. Wardhana Kusuma. “Optimization Ultrasonic Assisted Extraction of Dye from African Tulip Leaves (Spathodea Campanulata P. Beauv) and Optimization of It’s Application As A Textiles Dye”. Indonesian Journal of Chemical Science, Vol. 12, no. 2, Aug. 2023, pp. 143-60, doi:10.15294/ijcs.v12i2.70623.