สมถวิล สุวรรณา. 2016. “Factors Related to Performance Existence as Parents’ Dental Health Volunteers at Anuban Saraburi School, Saraburi Province”. Thai Dental Public Health Journal 21 (2). Bangkok, Thailand:37-46. https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/149206.