Abdullah, Mohabat Nuri, and Shaimaa Esmat M. Amin. “The Role of Procedural Leadership in Reducing Organizational Silence An Analytical Study of the Opinions of a Sample of Administrative Staff in the Colleges of Salahaddin University Erbil”. Tikrit Journal of Administrative and Economic Sciences, vol. 18, no. 57, 2, Mar. 2022, pp. 314-36, doi:10.25130/tjaes.18.57.2.19.