Oji, Okechukwu Richard. “The Challenges of Internal Party Democracy to Nigerian Democratic Process: A Study of PDP and APC (1999-2023)”. Direct Research Journal of Social Science and Educational Studies 12, no. 3 (November 5, 2024): 1–17. Accessed May 1, 2026. https://journals.directresearchpublisher.org/index.php/drjsses/article/view/262.