Supanam ส., Somkong อ., and Ruangkitudom น. . “The Factors Predicting Clients’ Satisfaction of Out-Patient Department Service in The Chinnakhet Hospital”. EAU Heritage Journal Science and Technology, vol. 15, no. 3, Dec. 2021, pp. 190-0, https://he01.tci-thaijo.org/index.php/EAUHJSci/article/view/248110.