Ginting, Ella Silvana, Apren Halomoan Hutasoit, and Naca Peranginangin. “North Sumatra Economic Growth Analysis”. Jurnal Mantik 5, no. 1 (April 30, 2021): 184-190. Accessed October 23, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/1297.