Rojanaworarit, Chanapong. 2015. “Incidence and Etiology of Maxillofacial Trauma: A Retrospective Analysis of Patients Attending a Provincial Hospital in Northern Thailand”. Journal of Public Health and Development 13 (2). Bangkok, Thailand:57-71. https://he01.tci-thaijo.org/index.php/AIHD-MU/article/view/38066.