Analisis Kebutuhan Bahan Ajar Matematika Berbasis Problem Based Learning (PBL) Kelas IV Studi Kasus: SD Muhammadiyah Pataan. Elementary School and Education Journal, [S. l.], v. 1, n. 1, 2025. Disponível em: https://esej.uim-yogya.ac.id/index.php/esej/article/view/4. Acesso em: 14 may. 2026.