King, Ting Sie. “Practical-Oriented CNC Educational Tool to Promote Retention of Knowledge for First Year Engineering Students”. International Journal on Advanced Science, Engineering and Information Technology 8, no. 4-2 (September 28, 2018): 1565–1570. Accessed July 22, 2024. https://ijaseit.insightsociety.org/index.php/ijaseit/article/view/5884.