Tella, Charas Madu, and Aliyu Yahaya. “Classes, Class Conflict (Class Antagonism) And Class Struggle: A Brief Analysis Of Marxist Theory In The Context Of Nigeria”. Journal of Sociology, Psychology and Anthropology in Practice (JSPAP), vol. 2, no. 1-3, Dec. 2010, pp. 170-81, http://icidr.org.ng/index.php/Jspap/article/view/1553.