Khalid, Muhammad Haziq, Ramhuzaini Abd Rahman, Hanif Abdul Latif, and Musli Nizam Yahya. “Prototyping and Performance Evaluation of Fire Rated Acoustic Door”. International Journal of Integrated Engineering 10, no. 4 (September 3, 2018). Accessed July 4, 2022. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2224.