Hamzah, A., M. Helmy Syamza, M. Ahmad, A. Ariffin, M. Solah, and N. Paiman. “Assessing Motorcycle Safety Helmet Standards Compliance”. Journal of the Society of Automotive Engineers Malaysia, vol. 3, no. 4, Apr. 2021, pp. 48-56, doi:10.56381/jsaem.v3i4.139.