PERFORMANS DEĞERLENDİRMEDE 360 DERECE YÖNTEMİ VE KAHRAMANMARAŞ’TA OKUL YÖNETİCİLERİNE UYGULAMASI ÜZERİNE BİR ARAŞTIRMA (360 DEGREE PERFORMANCE EVALUATION METHOD AND A RESEARCH ON ITS APPLICATION TO SCHOOL MANAGERS IN KAHRAMANMARAŞ) - Arif Selim EREN -Arif Selim EREN-- Ahmet TUNÇ | International Journal of Disciplines in Economics & Administrative Sciences Studies