Hani Febrianti, et al. “Penggunaan Model Problem Based Learning Untuk Meningkatkan Hasil Belajar Tematik Siswa Kelas I”. Journal of Innovation in Primary Education, vol. 1, no. 2, Dec. 2022, pp. 114-21, https://ejournal.unma.ac.id/index.php/jipe/article/view/3937.