SIREGAR, T. A Penerapan Model Pembelajaran Problem-Based Learning Untuk Meningkatkan Prestasi Belajar Matematika Siswa Di SMA Negeri 1 Sinunukan. COMPETITIVE: Journal of Education, [S. l.], v. 2, n. 2, p. 94–102, 2023. DOI: 10.58355/competitive.v2i2.9. Disponível em: https://competitive.pdfaii.org/index.php/i/article/view/9. Acesso em: 18 oct. 2024.