Srisusach, A., and A. Promtow. “Development of Learning Activities Practical Skills Electric Motor Control Vocational Certificate Students Electrical”. Journal of Education Rajabhat Maha Sarakham University, vol. 17, no. 3, Dec. 2020, pp. 153-64, https://so06.tci-thaijo.org/index.php/edu-rmu/article/view/251539.