Lubis, A. . “PROSPEK USAHA PEDAGANG KELILING DI PASAR SIPIONGOT MENURUT PERSPEKTIF EKONOMI ISLAM”. Nahdatul Iqtishadiyah: Jurnal Perbankan Syariah, vol. 2, no. 1, July 2022, pp. 52-77, https://ejournal.iaipadanglawas.ac.id/index.php/nahdatuliqtishadiyah/article/view/77.