Srichomsorn, K., and T. Sungyuan. “Factors Effecting Stress of Loei Rajabhat University Students”. Research and Development Journal, Loei Rajabhat University, vol. 16, no. 57, July 2021, pp. 34-41, https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/248108.