คุปพิทยานันท์ เ. and ลีละศิธร ศ. (2013) “Oral health promotion activities and oral health status of children in day-care centers”, Thai Dental Public Health Journal. Bangkok, Thailand, 18(2), pp. 33–45. available at: https://he02.tci-thaijo.org/index.php/ThDPHJo/article/view/152923 (accessed: 18 September 2026).