“PENGARUH PENERAPAN MODEL PROBLEM BASED LEARNING TERHADAP KEMAMPUAN MEMECAHKAN MASALAH SISWA PADA MAPEL MATEMATIKA KELAS IV DI SDN 2 JERUKAN JAWA TENGAH”. 2026. Integrative Perspectives of Social and Science Journal 3 (05 Mei): 2951-59. https://ipssj.com/index.php/ojs/article/view/1411.