R. Razman Hafifi, and M.H. Muhammad Zaly Shah. “COMPARATIVE NUMERICAL ANALYSIS OF VEHICLE ENTRY PERMIT CHARGES PRE- AND POSTIMPLEMENTATION: IDENTIFYING SIGNIFICANT DIFFERENCES”. Malaysian Journal of Industrial Technology , vol. 6, no. 1, June 2022, pp. 25-31, https://ejournal.unikl.edu.my/index.php/mjit/article/view/623.