Ibrahim, A. N. H., M. N. Borhan, N. I. Md. Yusoff, and A. Ismail. “Rail-Based Public Transport Service Quality and User Satisfaction – A Literature Review”. Promet - Traffic&Transportation, Vol. 32, no. 3, May 2020, pp. 423-35, doi:10.7307/ptt.v32i3.3270.