“An Empirical Investigation into Effectiveness Correlate of Transactional Leadership and Nurses Staff Variants in Kirkuk City Hospitals: An Analytical Study of Leadership Impact on Nursing Performance and Organizational Outcomes"”. Journal of Current Medical Research and Opinion, vol. 8, no. 04, Apr. 2025, pp. 4113-21, https://doi.org/10.52845/CMRO/2025/8-4-10.