Pinthapataya, J. ., and K. . Phongphothakul. “Effective Capability Enhancement for Efficient Employees in Duty-Free Enterprise”. Rajapark Journal, vol. 14, no. 35, Aug. 2020, pp. 163-77, https://so05.tci-thaijo.org/index.php/RJPJ/article/view/244143.