MANULLANG, Y. S. . .; SIREGAR, N. . .; BUTARBUTAR, I. . . The Effect Of The Problem Based Learning (PBL) Learning Model On Improving Students’ Learning Motivation In The Christian Religious Education Subject Of Grade XII . Jurnal Ilmu Pendidikan dan Sosial, [S. l.], v. 4, n. 3, p. 320–333, 2025. DOI: 10.58540/jipsi.v4i3.1035. Disponível em: https://putrapublisher.org/ojs/index.php/jipsi/article/view/1035. Acesso em: 18 apr. 2026.