Riswanto, Bayu, and Sitti Aminah. “Utilization of Kalpataru Flower Extract (Hura Crepitans Linn) As an Alternative Acid Base Indicator”. Jurnal Akademika Kimia 9, no. 3 (August 28, 2020): 148–157. Accessed May 17, 2024. http://jurnal.fkip.untad.ac.id/index.php/jak/article/view/50.