MELIANA R HUTAJULU, Helen; SETIAWAN, Deny. Pengaruh Model Problem Based Learning terhadap Hasil Belajar PPKn di SMP Methodist 9 Medan . Jurnal Pendidikan Kewarganegaraan, [S. l.], v. 9, n. 1, p. 61–72, 2025. DOI: 10.31571/jpkn.v9i1.8178. Disponível em: https://journal.upgripnk.ac.id/index.php/kewarganegaraan/article/view/8178. Acesso em: 25 jul. 2025.