Srinukul, N., Aiyakorn, S. . and Udomkijmongkol, C. . (2022) “Work Motivation Affecting Happiness at Work for the Personnel of the Ministry of Labor in the Upper Northeastern Region 2”, Interdisciplinary Academic and Research Journal , 2(5), pp. 253–272. doi: 10.14456/iarj.2022.95.