1. Global Status Report on Road Safety 2018;World Health Organization (WHO),2018
2. Land transportation Statistics 2018 (Statistik Transportasi Darat 2018);Central Bureau of Statistics (Badan Pusat Statistik),2019
3. Minister of Transportation: 70% of Traffic Accidents in Indonesia Experienced by Motorcycle Riders (Menhub: 70% Kecelakaan Lalu Lintas Dialami Sepeda Motor);Antara,2019