Somchai Chuachan ส. เ., Wandee Sutthinarakorn ว. ส., and จีรพัฒน์ธนธร ภ. “Guidelines to Self-Employed Career of High Vocational Certificate Students in Institutes under the Office of the Vocational Education Commission”. Dusit Thani College Journal, vol. 12, no. 2, May 2018, pp. 224-38, https://so01.tci-thaijo.org/index.php/journaldtc/article/view/126004.