Ritartini. “Improving Collaborative Ability and Learning Achievement in Mathematics Through the Project-Based Learning (PjBL) Model Using Diagram Image Media for Class VI Students of SD Negeri Purwoharjo Academic Year 2021/2022”. IJCER (International Journal of Chemistry Education Research) 7, no. 2 (October 25, 2023): 76–80. Accessed November 21, 2024. https://journal.uii.ac.id/IJCER/article/view/29375.