WINDA ARTANTRI, MARTIA, SUBAGYO, and M. MUCHSON. “BUKU AJAR EKONOMI KELAS X”. Universitas Nusantara PGRI Kediri (March 31, 2023): 1–144. Accessed May 16, 2024. https://penerbit.unpkediri.ac.id/index.php/unp/article/view/31.