Ramadhani Said Tekka. “Contractor’s Competencies, Business Strategy and Business Performance: A Structural Model”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 63, no. 2 (August 21, 2022): 140–157. Accessed October 2, 2025. https://gssrr.org/JournalOfBasicAndApplied/article/view/14335.