Thammaro, T., A. P. D. P. Soonthornchai, and A. P. D. K. namnai. “Effects of Professionalism on Audit Efficiency of Cooperative Auditing Office in Northeastern Thailand”. Journal for Developing the Social and Community, vol. 6, no. 1, June 2019, pp. 109-22, https://so03.tci-thaijo.org/index.php/rdirmu/article/view/211395.