Tiansoodeenon, Mongkolchai, Benjawan Rungruangsuparat, Wanpen Poomarin, Kongkiat Khunasathitchai, and Sarochrus Tarapond. 2022. “Speaking errors analysis: A case study of English-major undergraduate students at Rajamangala University of Technology Thanyaburi”. RMUTSB ACADEMIC JOURNAL (HUMANITIES AND SOCIAL SCIENCES) 7 (2). ฺBangkok, Thailand:131-45. https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/258595.