Siregar, Sharha Azizi, Nuraina Nuraina, and Fitri Ayu Ningtiyas. “The Effect of the Problem-Based Learning Model With a Metacognitive Approach on Students’ Mathematical Representation Ability”. Jurnal Ilmiah Kanderang Tingang 17, no. 2 (October 20, 2026): 323-339. Accessed October 23, 2026. https://www.chem-upr.education/ojs/index.php/JIKT/article/view/458.