BIEREENU-NNABUGWU, M., and P. C. UCHENDU. “Dialectics of Essential Virtues in Plato’s Good State: An Analysis”. Nnamdi Azikiwe Journal of Political Science, vol. 4, no. 2, Aug. 2014, pp. 1-16, https://najops.org.ng/index.php/najops/article/view/180.