Z. M. Sadq, N. A. Aljaf, and R. S. Hasan, “The Role of Human Capital in Achieving Competitive Advantages: An Empirical Study at Knowledge Private University /Erbil, Iraq”, IJSSES, vol. 4, no. 4, pp. 53–63, Jun. 2018, doi: 10.23918/ijsses.v4i4p53.