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Rahman, Muhammad Abdul and Santosa, Achadi Budi and Sihotang, Hotmaulina (2020) The Influence of Principal’s Leadership, Teacher Performance And Internal Quality Assurance System in Improving The Quality of Education in Vocational High School. Kelola: Jurnal Manajemen Pendidikan, 7 (2). pp. 162-175. ISSN 2549 9661