Supamas Kettem และ Kamolthip Phonlabutra. (2020) Research and Development of the Online Blended Course in Practical English Phonetics. <i>Journal of Humanities and Social Sciences</i>, <i>39</i>(5), .58-69.Supamas Kettem และ Kamolthip Phonlabutra. "Research and Development of the Online Blended Course in Practical English Phonetics". Journal of Humanities and Social Sciences 39 (2020):.58-69.Supamas Kettem และ Kamolthip Phonlabutra. Research and Development of the Online Blended Course in Practical English Phonetics. mahasarakham university:ม.ป.ท. 2020.