Wonglim, Parichat, and Rachen Noppanatwongsakorn. 2022. “The Behaviors of the Preparation Before Retirement Preparation Office of the Bangkok Metropolitan Administration Civil Service Commission Preparation”. Journal of Graduate MCU KhonKaen Campus 9 (1):153-66. https://so02.tci-thaijo.org/index.php/jg-mcukk/article/view/254457.