Dheva-Aksorn, Kirana, and Prathurng Hongsranagon. 2018. “Customers Satisfaction and Core Competency on Service-Minded Among Frontline Staff of the Department of Medical Sciences, Ministry of Public Health, Thailand”. Journal of Health Research 31 (Suppl. 2):S245-250. https://he01.tci-thaijo.org/index.php/jhealthres/article/view/114560.