Saragih, Dahliana. “Analysis of Determinants of Regional Economic Growth on the East Coast of North Sumatra”. ProBisnis : Jurnal Manajemen 12, no. 1 (April 30, 2021): 1–7. Accessed June 21, 2026. https://ejournal.joninstitute.org/index.php/ProBisnis/article/view/1.