ผ่องพลีศาล ก. “Competency of Police Officers in The Transit Sub-Division, Immigration Office,Suwannabhumi International Airport”. Journal of Rattana Bundit University, vol. 13, no. 1, Aug. 2018, pp. 52-61, https://so03.tci-thaijo.org/index.php/rbac/article/view/224611.