Keawsawat , B., W. Jankingthong, and J. Jedsarid. “Employee Satisfaction and Work Discipline Affecting Job Performance of Tour Guides in Southern Thailand”. Ph.D. in Social Sciences Journal, vol. 16, no. 2, Aug. 2026, p. e279606, https://so05.tci-thaijo.org/index.php/phdssj/article/view/279606.