Igho, Okpewho Lucky. “Building on Firm Competitive Advantage through Core Competence Manufacturing Firm”. International research journal of management, IT and social sciences 9, no. 6 (November 3, 2022): 800–812. Accessed July 21, 2026. https://www.sloap.org/journals/index.php/irjmis/article/view/2212.