Vorster, Nico. “The GKSA’s Use of Article 30 CO in the Era of Apartheid”. NGTT | Nederduitse Gereformeerde Teologiese Tydskrif 53, no. 3&4 (February 6, 2013): 404–412. Accessed October 18, 2025. https://ojs.reformedjournals.co.za/index.php/ngtt/article/view/774.