Chaichompoo, M. ., and S. . Saiyasopon. “Leadership roles that influence the effectiveness of public service in the local administrative organization, sakon nakhon province”. Journal for Developing the Social and Community, vol. 8, no. 2, Aug. 2021, pp. 135-54, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/250760.