VAN BLERK, H.; KELLERMAN, J. S. Die onoorskatbare belangrikheid van die inleidingskonsep in die ganse lewe, met besondere verwysing na die preekinleiding. Acta Theologica, [S. l.], v. 16, n. 2, p. 41–68, 1996. DOI: 10.38140/at.v16i2.6152. Disponível em: https://journals.ufs.ac.za/index.php/at/article/view/6152. Acesso em: 13 apr. 2025.