Putra, A., O.K. Hee, and S.H. Yahaya. “On Investigating the C-Transition Curve for Noise Reduction”. Journal of Engineering and Technology (JET) 4, no. 2 (December 31, 2013): 103–114. Accessed May 17, 2024. https://jet.utem.edu.my/jet/article/view/252.