Turnip, Corry. “Pola Utilization of Nature Tourism Locations for Socio-Economic Life of Tigaras Village Community, Dolok Pardamean District, Simalungun Regency”. The International Journal of Politics and Sociology Research 10, no. 1 (June 1, 2022): 33–44. Accessed May 30, 2026. https://www.ijobsor.pelnus.ac.id/index.php/ijopsor/article/view/49.