Prastiwi, R., and A. Wathon. “Pengaruh Model Problem Based Learning Terhadap Hasil Belajar Matematika Siswa Kelas IV SDN”. Sistim Informasi Manajemen, vol. 7, no. 3, June 2024, pp. 1254-83, https://oj.lapamu.com/index.php/sim/article/view/246.