Hartono, Robert, and Debora Anne Yang Aysia. “Quality Improvement of SKT Cigarette Products (A Case Study)”. Semarak Proceedings of Applied Sciences and Engineering Technology 2, no. 1 (June 24, 2025): 1–14. Accessed July 30, 2025. https://semarakilmu.my/index.php/spaset/article/view/533.