Thongprasit, P., Yuphong, S., & Poolkrajang, A. (2020). The development of a soft skills model through self-learning for front-line service employees in service’s business. Journal of Humanities and Social Sciences Thonburi University, 14(2), 97–108. Retrieved from https://so03.tci-thaijo.org/index.php/trujournal/article/view/240392