Nikorn Pattalaka และ Narongrit Sopa. (2022) English Language Competencies and Professional Competencies Development of Primary School Teachers in Mahasarakham Province, Thailand by Using Onsite Training Courses and Online Training Courses. <i>International Journal of Sociologies and Anthropologies Science Reviews</i>, <i>2</i>(3), 53-64.Nikorn Pattalaka และ Narongrit Sopa. "English Language Competencies and Professional Competencies Development of Primary School Teachers in Mahasarakham Province, Thailand by Using Onsite Training Courses and Online Training Courses". International Journal of Sociologies and Anthropologies Science Reviews 2 (2022):53-64.Nikorn Pattalaka และ Narongrit Sopa. English Language Competencies and Professional Competencies Development of Primary School Teachers in Mahasarakham Province, Thailand by Using Onsite Training Courses and Online Training Courses. DR.KEN Institute of Academic Development and Promotion:ม.ป.ท. 2022.