Muhammad Al Gammal , Najeem Adewale Sharaf , Adel Abdel Fadeel Eid Bleek. “E-Learning of Foreign Language for the Employees and Majority of Countries Requirements”. PalArch’s Journal of Archaeology of Egypt / Egyptology, vol. 17, no. 6, Dec. 2020, pp. 8748 -56, https://archives.palarch.nl/index.php/jae/article/view/2281.