Mooltongton, P., C. Visitnitikija, and S. Jobsri. “Motivation Factors Affecting the Performance of the Employees of 3 Stars hotel in Bangkok”. Journal of Humanities and Social Sciences Review, vol. 23, no. 2, Oct. 2021, pp. 39-49, https://so05.tci-thaijo.org/index.php/hspbruacthjournal/article/view/256733.