Anyaobi, G., M. O. Nina-okpousung, and O. Akpoma. 2012. “Leadership Related Variables Influencing Job Performance Of Staff In Delta State Polytechnics Libraries, Nigeria”. Journal of Research in Education and Society (JRES) 3 (1):79-84. http://icidr.org.ng/index.php/Jres/article/view/1269.