Ekwonwune, Emmanuel Nwabueze, Duru Ngozi A., and Uka Kanayo K. “Design of a Web – Based Online Contract Administrative System Platform of an Engineering Firm”. International Journal of Engineering and Computer Science 8, no. 05 (May 12, 2019): 24612–24620. Accessed December 22, 2024. http://ijecs.in/index.php/ijecs/article/view/4285.