Soma, R., and J. Pongpanpattana. “Effects of Internal Audit Strategy on Operational Efficiency of Universities under the Commission on Higher Education”. Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University, vol. 11, no. 2, Feb. 2017, pp. 162-73, https://so01.tci-thaijo.org/index.php/GraduatePSRU/article/view/72017.