VERIERO SIREGAR, Roberto Carlos. Bentuk Negara dan Sistem Pemerintahan. Journal of Islamic Law El Madani, [S. l.], v. 3, n. 1, p. 87–97, 2024. DOI: 10.55438/jile.v2i2.99. Disponível em: https://journal.marwah-madani-riau.id/index.php/JILE/article/view/99. Acesso em: 1 sep. 2026.