Ahmad, E., M. Alsafadi, A. Mashal, W. Saleh, and H. Assaf. “The Impact of Human Resources (HR) Activities on Competitive Advantage in Private Schools in Jordan: A Case Study”. International Journal of Research in Business and Social Science (2147- 4478), vol. 10, no. 4, June 2021, pp. 139-4, doi:10.20525/ijrbs.v10i4.1165.