Nakornthap, M., and S. Tuntivivat. “The Causal Relationship Model of an Authentic Leadership for Community Development Volunteer Leaders”. The Periodical of Behavioral Science, vol. 29, no. 1, Jan. 2023, pp. 20-38, https://so06.tci-thaijo.org/index.php/BSRI/article/view/257731.