จงเกียรติกาญจน์ พ. . A LEADERSHIP DEVELOPMENT MODEL FOR MIDDLE MANAGEMENT OF PRIVATE SCHOOL UNDER UDON THANI EDUCATIONAL SERVICE AREA OFFICE 1. Journal of MCU Social Science Review, Ayutthaya, Thailand, v. 6, n. 2-02, p. 571–584, 2020. Disponível em: https://so03.tci-thaijo.org/index.php/jssr/article/view/242198. Acesso em: 19 may. 2024.