Pertiwi, Mila, A.Y Soegeng Ysh, and Filia Prima Artharina. “Implementasi Model Problem Based Learning Berbantu Lego Dalam Meningkatkan Hasil Belajar Matematika SD”. International Journal of Elementary Education 3, no. 2 (July 16, 2019): 210–217. Accessed April 27, 2024. https://ejournal.undiksha.ac.id/index.php/IJEE/article/view/18530.