YAU, JIA YIN, and Nureize Arbaiy. “Customer Billing System for Excavator Workshop”. Applied Information Technology And Computer Science 6, no. 1 (July 8, 2025): 2396–2406. Accessed April 7, 2026. https://publisher.uthm.edu.my/periodicals/index.php/aitcs/article/view/16167.