So-oabeb, Josef, and Andre du Plessis. “Leadership Competencies for Teacher Professional Development: Perspectives of Namibian Principals, Heads of Departments and Teachers”. Perspectives in Education 41, no. 2 (June 30, 2023): 16–32. Accessed November 24, 2024. https://journals.ufs.ac.za/index.php/pie/article/view/7097.