GARBA, Umar.
 Principals' Administrative Strategies for School Effectiveness in Secondary Schools in Yobe State.
<strong>NIU Journal of Social Sciences</strong>, [S.l.], v. 5, n. 2, p. 177-182, july 2019.
ISSN 3007-1690.
Available at: &lt;<a href="https://niujournals.ac.ug/ojs/index.php/niujoss/article/view/524" target="_new">https://niujournals.ac.ug/ojs/index.php/niujoss/article/view/524</a>&gt;. Date accessed: 27 may 2026.