Sofiatulmaula, Ana, et al. “244. Peningkatan Hasil Belajar Kognitif Menggunakan Model Problem Based Learning Di SD 1 Wergu Wetan”. Prosiding Seminar Nasional Pendidikan Profesi Guru, vol. 1, no. 1, July 2023, pp. 2171-7, https://conference.upgris.ac.id/index.php/psnppg/article/view/4310.