Halim, Isa, Muhammad Syafiq Syed Mohamed, Lee Song Jin, and Akmal Hafiz Azani. “Design of Noise Insulator for Metal Stamping Operation in Manufacturing Sector”. International Journal of Integrated Engineering 11, no. 8 (December 4, 2019): 19-24. Accessed September 23, 2020. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2906.