Salim, R., Syed Tarmizi Syed Shazali, S. Hamdan, M. Andrew-Munot, and A. M. A. A. M. Mohtar. “A Review on Ruben’s Tube As Acoustic Propagator”. International Journal of Automotive and Mechanical Engineering 15, no. 4 (December 25, 2018): 6025–6033. Accessed April 23, 2024. https://journal.ump.edu.my/ijame/article/view/144.