แก้วสะอาดสรพงษ์, and บัววราภรณ์ณัฐพันธ์. “Improvements the Performance Efficiency of Aircraft Structure Repair Division”. Journal of Humanities and Social Sciences University of Phayao 3, no. 1 (June 28, 2019): 48 - 61. Accessed October 18, 2021. https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/198892.