الكلمات الرئيسية = 19. It is known as an infectious disease caused by the last detected virus of the Coronavirus series
The Influence of Authority Delegation on Leadership Performance during COVID19 Pandemic

المجلد 52، العدد 1، إبريل 2022، الصفحة 397-430

فيصل المناور؛ Mohamed Mahmoud Abdel aal Hassan