Neungreuthai Muangyen และผู้แต่งคนอื่นๆ. (2026) Characteristics of Thai Language Usage among Lao, Phu Thai, and Khmer Ethnic Children: A Case Study in Roi Et Province. <i>Aksara Pibul Journal</i>, <i>7</i>(1), 205-219.Neungreuthai Muangyen และผู้แต่งคนอื่นๆ. "Characteristics of Thai Language Usage among Lao, Phu Thai, and Khmer Ethnic Children: A Case Study in Roi Et Province". Aksara Pibul Journal 7 (2026):205-219.Neungreuthai Muangyen และผู้แต่งคนอื่นๆ. Characteristics of Thai Language Usage among Lao, Phu Thai, and Khmer Ethnic Children: A Case Study in Roi Et Province. Faculty of Humanities and Social Sciences, Pibulsongkram Rajabhat University:ม.ป.ท. 2026.