Therdbhuthadham, Theera, and Praiwan Manu. 2022. “The Influence of Time Management, Self-Esteem and Self-Efficacy on Work Happiness”. Rajapark Journal 16 (44). Bangkok, Thailand:192-203. https://so05.tci-thaijo.org/index.php/RJPJ/article/view/253852.