Khengkaew, S. . “Research and Development of Teaching and Learning Technology Competencies Using the Self-Learning Activity Sets for Teachers of Srithepprachasan School Under the Secondary Education Service Area Office of Phetchabun”. Journal of Intellect Education, vol. 1, no. 4, Aug. 2022, pp. 35-49, https://so06.tci-thaijo.org/index.php/IEJ/article/view/263100.