Punkaew, Sarunya, and Woranat Sangmanee. 2019. “The Demand of the Competency Development of Staff Working in the Calibration Laboratory”. The Journal of Integrated Business Innovation and Sustainability (JIBIS) 9 (2). Bangkok, Thailand:220-36. https://so02.tci-thaijo.org/index.php/fam/article/view/241541.