Botha, Johan. “Diversity in Unity – Voices from the Past, the Focus on Belhar and the on-Going Quest for Unity”. NGTT | Nederduitse Gereformeerde Teologiese Tydskrif 54, no. Supp 2 (December 14, 2013): 50–60. Accessed October 18, 2025. https://ojs.reformedjournals.co.za/index.php/ngtt/article/view/621.