Lertyaso, S., Chantamoly, S., Suwan, P. and Hoonnirun, P. (2020) “Happiness Promotion Model for Steel Factory Employees in Nonthaburi Province”, Journal of The Royal Thai Army Nurses, 21(1), pp. 214–223. available at: https://he01.tci-thaijo.org/index.php/JRTAN/article/view/241545 (accessed: 3 October 2026).