Safrizal, Edi Abdurrahman, Ford Lumban Gaol, Spits Warnas Harco Leslie Hendric. “Adoption of the National Public Transport Driver Behavior and Competency Assessment Model”. Design Engineering, no. 1 (February 7, 2022): 1403-1412. Accessed May 3, 2024. http://www.thedesignengineering.com/index.php/DE/article/view/9064.