Wicheanrat, W. ., S. Yafu, and P. Phumphatrakhom. “A Model for Developing English Communicative Competence of Basic Educational School Administrators”. Mahachula Academic Journal, vol. 6, no. 2, Nov. 2019, pp. 179-97, https://so04.tci-thaijo.org/index.php/JMA/article/view/192994.