Pothi, P., W. Sriyabhaya, and S. D. Huang. “Affecting Factors for Japanese Speaking Anxiety of East Asian Languages Program Students Japanese Course Chiang Rai Rajabhat University”. Fa Nuea Journal, vol. 13, no. 2, Dec. 2022, pp. 39-58, https://so01.tci-thaijo.org/index.php/FaNJ/article/view/259571.