Jengtee, A., Y. Kumsang, S. Jaovisidha, R. Pornkul, and J. Jatchavala. “Chest Radiography in Children: Factors Affecting Medical Radiographers at Work”. Ramathibodi Medical Journal, vol. 36, no. 4, Dec. 2013, pp. 243-8, https://he02.tci-thaijo.org/index.php/ramajournal/article/view/117577.