Hidayat, Muhammad, Ranti Darwin, and M. Fikry Hadi. “Inequality of Interregional Development in Riau Indonesia; Panel Data Regression Approach”. International Journal of Economics and Financial Issues 8, no. 5 (September 4, 2018): 184–189. Accessed December 23, 2024. https://econjournals.com./index.php/ijefi/article/view/6919.