“Analysis and Design of a Point of Sales (POS) System at Elite Seven Café & Billiard Kisaran”. International Journal of Economics Development Research (IJEDR) 7, no. 3 (September 3, 2026): 202–221. Accessed September 8, 2026. https://journal.yrpipku.com/index.php/ijedr/article/view/12055.