Usani, Nfawa Erasmus, Emem Akaninyene Sampson, and Aniekan Rupert Inwang. “Unethical Marketing Practices by Petroleum Black Marketers in Akwa Ibom State, Nigeria”. Journal of Global Economics & Sustainable Development 1, no. 1 (September 27, 2025): 39–46. Accessed April 17, 2026. https://journals.e-palli.com/home/index.php/jgesd/article/view/5194.