Panpanich, P.; Suwanseantavee, V. Personnel Administration Based on the Seven Principles of Sappurisadhamma by School Administrators Under Special Education Center Efficiency Promotion Network Group 9, Office of Special Education Administration: Personnel Administration Based on the Seven Principles of Sappurisadhamma by School Administrators Under Special Education Center Efficiency Promotion Network Group 9, Office of Special Education Administration. rtnb 2025, 7, 244-256.