Omr, M. A., R. I. Mohammed, and N. M. Ali. “Strategies of Marketing Mix and Its Role in Increasing of Market Share: Exploring Study for The Opinions of Employees in City Centre Company at Zakho City”. Humanities Journal of University of Zakho, vol. 3, no. 2, Dec. 2015, pp. 556-73, doi:10.26436/hjuoz.2015.3.2.224.