Ezigbo, Charity A., and Court Ogele Timinepere. 2011. “The Effects Of Monetary And Non-Monetary Rewards On The Employees’ Performance In Manufacturing Firms In Rivers State, Nigeria”. Journal of Sociology, Psychology and Anthropology in Practice (JSPAP) 3 (1):120-29. http://icidr.org.ng/index.php/Jspap/article/view/1584.