Herlina. “UPAYA PENINGKATAN HASIL DAN MOTIVASI BELAJAR IPS MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING (PBL)”. Jurnal Ilmu Pendidikan dan Sosial 1, no. 4 (December 31, 2022): 460–464. Accessed May 17, 2026. http://putrapublisher.org/index.php/jipsi/article/view/95.