WOLHUTER, C. C.; OOSTHUIZEN, I. J.; VAN STADEN, J. G. Skoolfase/Leerderouderdom as Faktor in Leerderdissipline in Suid-Afrikaanse Skole. Tydskrif vir Christelike Wetenskap | Journal for Christian Scholarship, [S. l.], n. 1, p. 169–186, 2010. Disponível em: https://pubs.ufs.ac.za/index.php/tcw/article/view/238. Acesso em: 28 oct. 2025.