Badrawani, Wishnu, John Fender, and Muhammad Hasan Ghozali. “Do Rupiah Coins Have Any Value? A Cross Country Comparison and Evaluation of Rupiah Denominations”. JAS (Journal of ASEAN Studies) 12, no. 2 (January 22, 2024): 305–330. Accessed July 1, 2025. https://journal.binus.ac.id/index.php/jas/article/view/11321.