Isah, Noradrenalina, et al. “Probing the Effectiveness of ‘OP Selamat’ in Creating the Perception of Being Caught Among Road Users in Malaysia”. Journal of Advanced Vehicle System , vol. 4, no. 1, Dec. 2017, pp. 10-16, https://karyailham.com.my/index.php/javs/article/view/313.