Ritonga, Farhan Ardian, et al. “Upaya Meningkatkan Hasil Belajar Matematika Dengan Model Problem Based Learning Melalui Pendekatan Culturally Responsive Teaching Di Kelas V SDN 060812 Medan”. Jurnal Pendidikan Tambusai, vol. 8, no. 3, Dec. 2024, pp. 50136-47, http://jptam.org/index.php/jptam/article/view/23799.