Boonprakob, M., and P. Boonprakob. “Factors Affecting Work Behaviors After the Retirement of Gobernment Officials at Srinakharinwirot University”. The Journal of Behavioral Science, vol. 2, no. 1, July 2012, pp. 41-53, https://so06.tci-thaijo.org/index.php/IJBS/article/view/2146.