วรภัทร์ถิระกุลพ. “MOTIVATION IN PERSONNEL’S PERFORMANCE AFFECTING TO ADMINISTRATION OF NATIONAL HEALTH SECURITY OFFICE, AREA BRANCH 13 (BANGKOK).”. Journal of MCU Nakhondhat, Vol. 6, no. 1, Apr. 2019, pp. 486-98, https://so03.tci-thaijo.org/index.php/JMND/article/view/154095.