จิระโร ศ. and อังศุโชติ ส. 2021. Validating Sukhothai Thammathirat Open University’s Computer-Based English Proficiency Test (STOU-EPT) Under the Common European Framework of Reference for Languages (CEFR). Journal of Social Sciences in Measurement Evaluation Statistics and Research. 2, 1 (Jun. 2021), 27–35.