Rattanasopa, B. and Teekaporn, T. 2023. INTERNAL SUPERVISION MANAGEMENT OF SCHOOL ADMINISTRATORS AFFECTING ADMINISTRATIVE PROCESS AND MANAGEMENT IN ECONDARY SCHOOLS OF NAKHON SAWAN PROVINCE,UNDER THE SECONDARY DUCATIONAL SERVICE, AREA OFFICE NAKHON SAWAN 42. MCU Haripunchai Review. 7, 4 (Dec. 2023), 66–82.