Yunitasari, Nova, and Grendy Mattew. “Pengaruh Model Problem Based Learning Terhadap Hasil Belajar Ekonomi Siswa Kelas XI SMA Negeri 1 Silahisabungan ”. Jurnal Pendidikan Ekonomi dan Entrepreneurship 1, no. 1 (November 10, 2022): 12-21. Accessed November 22, 2024. https://ejournal.uhn.ac.id/index.php/entrepreneurship/article/view/980.