Nel, Johan N, and Jan-Albert Wessels. “How to Use Voluntary, Self-Regulatory and Alernative Environmental Compliance Tools: Some Lessons Learnt”. Potchefstroom Electronic Law Journal 13, no. 5 (June 19, 2017): 47–78. Accessed May 8, 2024. https://perjournal.co.za/article/view/2710.