Oosthuizen, I. J., and P. du Toit. “The Pragmatic Paradigm As a Viable Option for School-Based Research”. Tydskrif Vir Christelike Wetenskap | Journal for Christian Scholarship, vol. 48, no. 3-4, Dec. 2012, pp. 333-55, https://pubs.ufs.ac.za/index.php/tcw/article/view/300.