Jabir, Adnan Shamkhi, Kamil Shkaier Al.watifi, and Abbas kh. Aljanabi. 2019. “Quality of Service and Its Impact in Achieving Competitive Advantage”. JOURNAL OF UNIVERSITY OF BABYLON for Pure and Applied Sciences 27 (2), 208 -27. https://doi.org/10.29196/jubpas.v27i2.2087.