Kriswardhana, W., N. N. Hayati, and K. D. Puspita. “Willingness to Pay Model for Motorcyclists’ Slight Injuries in Jember”. Jurnal Teknik Sipil, vol. 27, no. 3, Dec. 2020, pp. 231-8, doi:10.5614/jts.2020.27.3.4.