Suwannaporn, S., P. Hongsranagon, and P. Havanond. “Knowledge, Attitude, And Practice Towards Helmet Use Among Motorcycle Riders And Passengers In Ratchaburi Province, Thailand”. Journal of Health Research, vol. 27, no. 1, May 2017, pp. 27-32, https://he01.tci-thaijo.org/index.php/jhealthres/article/view/85750.