de Waal, Elda. “Random Drug-Testing: The Duty to Act Against Learners Who Use Drugs”. Acta Academica: Critical views on society, culture and politics 39, no. 2 (August 24, 2007): 228–246. Accessed April 2, 2025. https://journals.ufs.ac.za/index.php/aa/article/view/1147.