van der Walt, B. J. “The Philosophy of D.H.Th. Vollenhoven (1892 - 1978) – With Special Reference to His Historiography of Philosophy”. Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship 42, no. 1 - 2 (January 31, 2006): 35-59. Accessed May 3, 2024. https://pubs.ufs.ac.za/index.php/tcw/article/view/63.