Hastuti, Pebri, Roza Thohiri, and Yanti Panggabean. “Pengembangan E-Module Berbasis Problem Based Learning Mata Pelajaran Ekonomi Kelas X SMA Negeri 1 Percut Sei Tuan Tahun Ajaran 2018/2019”. Ganaya : Jurnal Ilmu Sosial dan Humaniora 3, no. 2 (September 1, 2020): 290–299. Accessed July 22, 2024. https://jayapanguspress.penerbit.org/index.php/ganaya/article/view/500.