Auiwattanakul, Pimsiri, and Jetnipit Sommart. “Factors Correlated with the Confidence toward Health Product Certification Marks of the Vocational Students in KhonKaen”. UBRU Journal for Public Health Research 9, no. 1 (June 30, 2020): 153–161. accessed October 11, 2026. https://he02.tci-thaijo.org/index.php/ubruphjou/article/view/243324.