Raja, Togu Harlen Lbn, and Sofiyan . “Analysis of Production Sectors in Creating Main Sector in Regional Economy (Case Study: North Sumatra Province - Indonesia)”. Account and Financial Management Journal 3, no. 01 (January 20, 2018): 1285–1289. Accessed May 12, 2024. http://everant.org/index.php/afmjh/article/view/105.