Thanyamai Prachyawuttirat และ Chalong Chatruprachewin;Rattana Buosonte. (2022) Grounded Theory of Principle Leadership: Multi-Cases Studies. <i>Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University</i>, <i>16</i>(1), 367-380.Thanyamai Prachyawuttirat และ Chalong Chatruprachewin;Rattana Buosonte. "Grounded Theory of Principle Leadership: Multi-Cases Studies". Humanities and Social Sciences Journal of Pibulsongkram Rajabhat University 16 (2022):367-380.Thanyamai Prachyawuttirat และ Chalong Chatruprachewin;Rattana Buosonte. Grounded Theory of Principle Leadership: Multi-Cases Studies. Pibulsongkram Rajabhat University:ม.ป.ท. 2022.