“Income Analysis of Coffee Farmers and Its Impact on Regional Development (Case Study: Pematang Sidamanik District, Simalungun Regency, Indonesia): English” (2024) Asian Multidisciplinary Research Journal of Economy and Learning, 1(1), pp. 20–26. Available at: https://argaelpublisher.com/index.php/amjel/article/view/4 (Accessed: 6 February 2025).