Thilajai, Suratnaree, Praphat Naphikun, Prawet Wetcha, and Suwadee Ouppinjai. 2020. “The Supervision Model for a Dual Curriculum of Vocational and Upper Secondary Educaiton Institutions in Chiang Mai Province”. Journal of Graduate Research 11 (1):105-19. https://so02.tci-thaijo.org/index.php/banditvijai/article/view/228793.