Raga Sitandang, Galang, Muhammad Firdaus, and Agustiyara. “Research Trends of Opposition Political Parties in the World”. Internasional Journal of Politics and Public Policy 1, no. 1 (August 10, 2024): 32–48. Accessed May 29, 2026. https://ejournal.suryabuanaconsulting.com/index.php/pppj/article/view/44.