Thapsuwiwatanakul, K., R. Singhalert, and A. Watha. “A Model for Improving Job Performance Efficiency of the Officers of Royal Thai Army Radio and Television Channel 5”. Chophayom Journal, vol. 27, Feb. 2016, pp. 163-8, https://so01.tci-thaijo.org/index.php/ejChophayom/article/view/72133.