K. Rungpisaln, S. Pilason, C. Chatram, P. Rungrod, and S. Thermsuk, “Development and Efficiency Analysis of an Instructional Package in Basic NC Programming for Vocational Certificate Students through the Integration of Experiential Teaching and Competency-Based Education (CBE)”, JTechEE, vol. 17, no. 1, pp. 1–17, Feb. 2026.