Handayani, Muslifah, et al. “219. Peningkatan Hasil Belajar Matematika Melalui Penerapan Model Pembelajaran Problem Based Learning Kelas II SD 1 Peganjaran”. Prosiding Seminar Nasional Pendidikan Profesi Guru, vol. 1, no. 1, July 2023, pp. 1957-6, https://conference.upgris.ac.id/index.php/psnppg/article/view/4248.