Sari, Septyana Wulan, et al. “63. Peningkatan Hasil Belajar Materi Waktu Melalui Model Pembelajaran Problem Based Learning Berbantuan Alat Peraga Siswa Kelas II SDN 1 Samirejo ”. Prosiding Seminar Nasional Pendidikan Profesi Guru, vol. 1, no. 1, July 2023, pp. 570-7, https://conference.upgris.ac.id/index.php/psnppg/article/view/3976.