Umpha Changkwien. (2026) An Analysis of Thai Writing Errors in Articles by 4th-Year Cadets at Chulachomklao Royal Military Academy. <i>Journal of Humanities and Social Sciences Mahasarakham University</i>, <i>45</i>(2), 653-665.Umpha Changkwien. "An Analysis of Thai Writing Errors in Articles by 4th-Year Cadets at Chulachomklao Royal Military Academy". Journal of Humanities and Social Sciences Mahasarakham University 45 (2026):653-665.Umpha Changkwien. An Analysis of Thai Writing Errors in Articles by 4th-Year Cadets at Chulachomklao Royal Military Academy. Mahasarakham University:ม.ป.ท. 2026.