ขำยัง คมกฤช. “The Development of Instructional Package by Using Project-Based Learning on Flashing Circuit for Developing Electronics Skills”. Vocational Education Central Region Journal 4, no. 2 (December 29, 2020): 55–61. Accessed April 20, 2024. https://so06.tci-thaijo.org/index.php/IVECJournal/article/view/246269.