Damanik, Sapnia W. R., Helti L. Simanullang, Yusnia A. Zalukhu, Arnadini Hulu, and Taruli Marito Silalahi. “Study Literatur Penerapan Model Problem Based Learning Untuk Meningkatkan Hasil Belajar Matematika Siswa SD”. Jurnal Pendidikan Tambusai 8, no. 3 (November 17, 2024): 44472–44477. Accessed July 14, 2025. https://jptam.org/index.php/jptam/article/view/21068.