Zgambo, H. F. “The Church and Ethnic Diversity: A Church Polity Approach for Structural Unification in the Contemporary Church”. Tydskrif Vir Christelike Wetenskap | Journal for Christian Scholarship, vol. 54, no. 1, Aug. 2018, pp. 71-93, https://pubs.ufs.ac.za/index.php/tcw/article/view/444.