Khattab, Mahran. M., and Najah. M. Werdee. 2023. “Service Quality and Its Impact on Brand Promotion: A Descriptive Study of a Sample of Asiacell Customers in Salah El-Din”. Tikrit Journal of Administrative and Economic Sciences 19 (63, 2):146-65. https://doi.org/10.25130/tjaes.19.63.2.8.