Mayukhachot, P. “Development of a Distance Training Package on the Topic of Teachers’ Competencies in Teaching Occupations and Technology for Lower Secondary Teachers in Bangkok and its vicinity”. Ratchaphruek Journal, vol. 12, no. 3, Dec. 2014, pp. 17-23, https://so05.tci-thaijo.org/index.php/Ratchaphruekjournal/article/view/240901.