محمد ﺇﺑﺮﺍﻫﻴﻢ ﻣﺤﻤﺪ
(2006):
ﻛﻴﻔﻴﺔ ﺇﻋﺪﺍﺩ ﺟﺪﻭﻯ ﺩﺭﺍﺳﺔ ﻟﻤﺸﺮﻭﻉ ﺻﻐﻴﺮ.وزارة اﻟﺘﺠـﺎرة واﻟﺼﻨﺎﻋﺔ.مصر.
URL
[Accessed: 25.08.2017]