van Zyl, SP. “The Collection of Value Added Tax on Cross-Border Digital Trade – Part 1: Registration of Foreign Vendors”. Comparative and International Law Journal of Southern Africa 47, no. 2 (March 17, 2022): 154–186. Accessed December 13, 2025. https://unisapressjournals.co.za/index.php/CILSA/article/view/10915.