Lestari, Indah Dwi, et al. “245. Penerapan Model Problem Based Learning Untuk Meningkatkan Hasil Belajar Matematika Kelas I SD 1 Peganjaran”. Prosiding Seminar Nasional Pendidikan Profesi Guru, vol. 1, no. 1, July 2023, pp. 2178-84, https://conference.upgris.ac.id/index.php/psnppg/article/view/4311.