Okereke, Joy. “IMPACT OF VARIATION ON COST PERFORMANCE OF BUILDING CONSTRUCTION PROJECTS IN NKANU-WEST LGA, ENUGU STATE”. Advanced Journal of Environmental Sciences (AJES) 15, no. 6 (June 27, 2024): 14–28. Accessed June 27, 2025. https://zapjournals.com/Journals/index.php/ajes/article/view/1987.