Strauss, D. F. M. “Sphere Sovereignty, Solidarity and Subsidiarity”. Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship 49, no. 3 (August 30, 2013): 93-123. Accessed April 27, 2024. https://pubs.ufs.ac.za/index.php/tcw/article/view/317.