แก้วสะอาดสรพงษ์, and บัววราภรณ์ณัฐพันธ์. 2019. “Improvements the Performance Efficiency of Aircraft Structure Repair Division”. Journal of Humanities and Social Sciences University of Phayao 3 (1), 48 - 61. https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/198892.