Panjaitan, Jesica, Firdaus Firdaus, and Dasrol Dasrol. “Praktik Penetapan Harga Pada Kegiatan Jual Beli Gabah Di Kecamatan Silaen Kabupaten Toba”. Jurnal Ilmiah Wahana Pendidikan 11, no. 10.B (September 25, 2025): 83-110. Accessed April 28, 2026. https://jurnal.peneliti.net/index.php/JIWP/article/view/13011.