Mungsan, W., and K. Muhammad. “Factors Affecting Employees’ Organizational Loyalty of Electricity Generating Authority of Thailand (EGAT) at Headquarter”. Journal of Humanities and Social Sciences, Rajapruk University, vol. 6, no. 2, Aug. 2020, pp. 151-64, https://so03.tci-thaijo.org/index.php/rpu/article/view/246223.