Sirait, Sarida, and Kalvin Sinaga. “Effective BUMDes Management Strategies to Improve Village Economy in Naga Dolok Village, Simalungun Regency”. Jurnal Mantik 4, no. 3 (November 30, 2020): 2218-2224. Accessed July 26, 2026. https://www.ejournal.iocscience.org/index.php/mantik/article/view/1106.