VAN DER WALT, B. J. Die Thomistiese antropologie en kenteorie: ? Kritiese waardering. Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship, [S. l.], v. 49, n. 1-2, p. 1–24, 2013. Disponível em: https://pubs.ufs.ac.za/index.php/tcw/article/view/303. Acesso em: 5 oct. 2025.