Stoker, P. H. “Wat Is Tyd?”. Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship 44, no. 3 - 4 (June 30, 2008): 89-113. Accessed May 6, 2024. https://pubs.ufs.ac.za/index.php/tcw/article/view/152.