The Influence Of The Problem Based Learning (PBL) Learning Model On Learning Motivation At SMP Swasta Muhammadiyah 55 Kandangan. Jurnal Pendidikan Sejarah Humaniora dan Ilmu Sosial, [S. l.], v. 1, n. 2, p. 12–29, 2023. DOI: 10.36985/7sfgx362. Disponível em: https://jurnal.usi.ac.id/index.php/nagur/article/view/1210. Acesso em: 18 apr. 2025.