Buaphiban, Thapanat. “Investigating Factors That Affect Student Pilot Training Time Duration by Using the Scheduling and Planning Method”. NKRAFA JOURNAL OF SCIENCE AND TECHNOLOGY 16, no. 1 (September 29, 2020): 16–28. Accessed May 2, 2024. https://ph02.tci-thaijo.org/index.php/nkrafa-sct/article/view/240445.