Nabilah, Azzah, and Candra Utama. 2025. “Effectiveness of Problem-Based Learning (PBL) in Improving Students’ Mathematical Ability: Results of a Literature Review”. Khalifah : Jurnal Pendidikan Nusantara 2 (2): 107-15. https://doi.org/10.62523/khalifah.v2i2.13.