Ramadhani Said Tekka, “Contractor’s Competencies, Business Strategy and Business Performance: A Structural Model”, IJSBAR, vol. 63, no. 2, pp. 140–157, Aug. 2022, Accessed: Dec. 08, 2025. [Online]. Available: https://gssrr.org/JournalOfBasicAndApplied/article/view/14335