La Việt, Hùng. “DEVELOPING CONTINGENT OF PRIMARY SCHOOL ADMINISTRATORS ACCORDING TO THE STANDARD TITLE OF PRINCIPAL IN CAO BANG PROVINCE”. SCIENTIFIC JOURNAL OF TAN TRAO UNIVERSITY 7, no. 23 (December 8, 2021). Accessed November 22, 2024. https://tckh.daihoctantrao.edu.vn/index.php/sjttu/article/view/638.