Anggia, Yola, Lai Wei Sieng, and Wye Chung Khain. “Regional Expansion Policy in the Northern Sumatra Province of Indonesia: Impact on Regional Inequality”. Journal of Business Management and Accounting 9, no. 2 (December 19, 2019): 93–103. Accessed April 19, 2024. https://e-journal.uum.edu.my/index.php/jbma/article/view/8725.