Garba, U.
(2019).
 Principals' Administrative Strategies for School Effectiveness in Secondary Schools in Yobe State.
<em>NIU Journal Of Social Sciences, 5</em>(2), 177-182.
Consultado de <a href="https://kampalajournals.ac.ug/ojs/index.php/niujoss/article/view/524" target="_new">https://kampalajournals.ac.ug/ojs/index.php/niujoss/article/view/524</a>