Phuangnoi, P., N. Kaewsai, S. Lerkbangplad, and B. Setobol. “The Integrated Learning System on Technical English for Communication in Careers…How and what is it?”. Applied Science and Engineering Progress, vol. 6, no. 1, Aug. 2013, pp. 81-86, https://ph02.tci-thaijo.org/index.php/ijast/article/view/67306.