Putri, Rifa Fauziah Syaifia, Nanda Riska Amelia, and Silvia Sulistiani. “Smart Tree on Knowledge of The Process of Calculus in Elementary School Children”. Journal Center of Excellent : Health Assistive Technology 2, no. 2 (September 23, 2024): 134–137. Accessed October 14, 2024. https://ejournal.poltekkesjakarta1.ac.id/index.php/jchat/article/view/1915.