van der Walt, Johannes L, and Charl C Wolhuter. “An Examination of the Potential of Culturalhistorical Activity Theory (CHAT) for Explaining Transitions in National Education Systems”. Acta Academica: Critical views on society, culture and politics 50, no. 1 (August 30, 2018): 104–125. Accessed April 3, 2025. https://journals.ufs.ac.za/index.php/aa/article/view/3557.