Panjaitan, Fenny Febrianti Br., Rick Hunter Simanungkalit, and Yanty Maria Marbun. “Pengaruh Model Pembelajaran Problem Based Learning Terhadap Kemampuan Pemecahan Masalah Matematika Kelas VII”. Jurnal Ilmu Pendidikan dan Sosial 4, no. 4 (January 30, 2026): 1115–1128. Accessed August 17, 2026. https://www.putrapublisher.org/index.php/jipsi/article/view/2313.