Wongsurit, S., P. Poonpol, and T. Junprasert. “The Effectiveness of Positive Psychological Capital Development Program Through Action Learning on affect Volunteer Behavior in the Compulsory volunteer Group”. The Periodical of Behavioral Science, vol. 29, no. 2, July 2023, pp. 76-92, https://so06.tci-thaijo.org/index.php/BSRI/article/view/262751.