Loo, Heoy Shin, et al. “Exploring the Factors Influence the Usage of Private Transport at Ayer Keroh, Melaka: Factors Influencing the Usage of Private Transport”. Proceedings of the Pakistan Academy of Sciences: A. Physical and Computational Sciences, vol. 56, no. 2, Mar. 2021, pp. 37-47, http://ppaspk.org/index.php/PPAS-A/article/view/128.