Pakpahan, Fitri Kristina, Nancy Angelia Purba, and Canni Loren Sianturi. “Pengaruh Model Problem Based Instruction Terhadap Hasil Belajar Siswa Kelas V Di SD Negeri 122350 Pematang Siantar”. Jurnal Pendidikan dan Konseling (JPDK) 4, no. 5 (October 23, 2022): 7060–7071. Accessed July 18, 2024. http://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/7852.