Usanee Khunmuak. (2026) Causal Factors of Competitive Advantage Influencing the Performance of OTOP Businesses in the Southern Border Provinces. <i>Journal of Humanities and Social Sciences Mahasarakham University</i>, <i>45</i>(2), 666-685.Usanee Khunmuak. "Causal Factors of Competitive Advantage Influencing the Performance of OTOP Businesses in the Southern Border Provinces". Journal of Humanities and Social Sciences Mahasarakham University 45 (2026):666-685.Usanee Khunmuak. Causal Factors of Competitive Advantage Influencing the Performance of OTOP Businesses in the Southern Border Provinces. Mahasarakham University:ม.ป.ท. 2026.