Rahmatullah, M. Riki, and Ubaidillah. “Ibnu Khaldun and Adam Smith: A Comparative Analysis of Economic Growth and State Role ”. Research Horizon 5, no. 2 (April 30, 2025): 457–466. Accessed July 27, 2026. http://journal.lifescifi.com/index.php/RH/article/view/592.