Ningtias, Silvia, Harjono Harjono, Cepi Kurniawan, and Samuel 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 12, no. 2 (August 26, 2023): 143-160. Accessed June 30, 2024. http://journal.unnes.ac.id/sju/ijcs/article/view/70623.