Pomsuwan, Suthinan. “A Study of Pre-retirement Preparation Behavior of Operational Employees in Bangkok and Metropolitan Areas”. Journal of Business Administration The Association of Private Higher Education Institutions of Thailand 13, no. 2 (December 7, 2024): 87–105. accessed April 17, 2025. https://so02.tci-thaijo.org/index.php/apheitvu/article/view/269904.