ERLISDA WAHYUNI; SUPENTRI. Upaya Meningkatkan Motivasi Belajar PPKN dengan Model Pembelajaran Problem Based Learning Setelah Covid-19 di SMPN 2 Siak-Riau. Jurnal Ilmu Sosial dan Humaniora, [S. l.], v. 1, n. 2, p. 132–152, 2022. DOI: 10.57248/jishum.v1i2.31. Disponível em: https://journal.ikmedia.id/index.php/jishum/article/view/31. Acesso em: 4 jul. 2025.