Idoro, Godwin Iroroakpo. “Influence in-Sourcing and Outsourcing of Consultants on Construction Project Performance in Nigeria”. Construction Economics and Building 11, no. 4 (December 9, 2011): 45-58. Accessed November 25, 2024. https://epress.lib.uts.edu.au/journals/index.php/AJCEB/article/view/2271.