Siriprakob, Chanya, Apaporn Kitsanapun, and Suratchana Changchivong. 2017. “Prevalence of Helmet Use Among Motorcycle Riders in Bangyai District, Nonthaburi”. Journal of Health Science of Thailand 26 (November):S209-S216. https://thaidj.org/index.php/JHS/article/view/194.