ทองย้อย อ.; สุเมโธ พ.; สมเขาใหญ่ ธ. THE LEADERSHIP OF DHAMMADHIPATEYYA FOR SCHOOL ADMINISTRATORS AFFECT TO THE TEACHER QUALITYIN THE OPPORTUNITY EXPANSION SCHOOL UNDERNAKHON SI THAMMARAT PRIMARY EDUCATIONALSERVICE AREA OFFICE 4. JSBA 2019, 2, 28-33.