UMAR, Rahmat Talatu.
 In-Service Training Needs of Colleges of Education Business Teachers for job Performance and Sustainable Development in North-West Geo-Political Zone, Nigeria..
<strong>NIU Journal of Humanities</strong>, [S.l.], v. 2, n. 2 (B), p. 235-241, feb. 2018.
ISSN 3007-1712.
Disponible en: &lt;<a href="https://www.kampalajournals.ac.ug/ojs/index.php/niuhums/article/view/176" target="_new">https://www.kampalajournals.ac.ug/ojs/index.php/niuhums/article/view/176</a>&gt;. Fecha de acceso: 07 ago. 2026