H. Azman, A., S.K. Singh, S., G.W. Aizon, W., Hishamuddin, H., R.M. Yazid, M., Abdullah, S., K. Ariffin, A., A. Wahab, A., Atiq, R., S. Solah, M., & Hamzah, A. (2018). The Needs to Establish an Integrated Safety System for Express Bus. International Journal of Engineering & Technology, 7(4.36), 1537-1540. https://doi.org/10.14419/ijet.v7i4.36.29367