Al-Nashmi, Assoc. Prof. Dr. Murad Mohammed, and Dr. Muna Saleh Saleh Al-Ghashmi. “Impact of Employees’ Performance on Achieving Competitive Advantage: A Field Study in the Mobile Phone-Run Companies in Sana’a”. Journal of Social Studies, vol. 26, no. 1, Apr. 2020, pp. 81-108, doi:10.20428/jss.v26i1.1623.