Saputra, H. “Improving Mathematics Problem-Solving Ability With Problem-Based Learning in V Grade Students”. Al-Adzka: Jurnal Ilmiah Pendidikan Guru Madrasah Ibtidaiyah, vol. 12, no. 1, June 2022, pp. 28-37, doi:10.18592/aladzkapgmi.v12i1.6401.