Benjamin O. Nwankwo, Eunice U. Nwoke, Uche M. Chukwuocha, Adolphus O. Obanny, Kachy S. Nwoga, Uchechukwu O. Iwuagwu and Chinwe Okereke
Pakistan Journal of Social Sciences 7 ( 2 ): 129 - 136 , 2010