แก้วสะอาด สรพงษ์, and บัววราภรณ์ ณัฐพันธ์. 2019. “Improvements the Performance Efficiency of Aircraft Structure Repair Division”. Trends of Humanities and Social Sciences Research 3 (1):48-61. https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/198892.