Sugarint, W., S. Viragoontavan, and M. Piriyakul. “Structural Influences of Contingency Leadership on Job Satisfaction of Village Health Volunteers in Saraburi Province”. WMS Journal of Management, vol. 3, no. 3, Mar. 2016, pp. 57-68, https://so06.tci-thaijo.org/index.php/wms/article/view/52801.