درويش توفيق. “Previous Studies and How to Use Them in Academic Research for Social Sciences: تاريخ الاستلام:30 10 2019 تاريخ القبول:03 01 2021”. Human Resources Development Research, vol. 16, no. 04, Dec. 2021, pp. 329-54, https://rdrh.univ-setif2.dz/index.php/rdrh/article/view/398.