Saimek, N., and T. Chittranum. “DEVELOPMENT ON ENHANCING MOTIVATION WORK PERFORMANCE OF THE TEACHER AT YASOTHON PRIMARY EDUCATIONAL SERVICE AREA OFFICE 1”. Journal of MCU Nakhondhat, vol. 7, no. 7, July 2020, pp. 332-44, https://so03.tci-thaijo.org/index.php/JMND/article/view/245019.