ÙŠÙˆØ³Ù, Ø., ÙØ¶Ù„, Ø., & Ø¬Ù…Ø§Ø¹, Ø. (2014). Ø£Ø«Ø± Ù…Ù‡Ø¯Ø¯Ø§Øª Ø§Ù„ØµØØ© Ø§Ù„Ø¹Ù…Ø§Ù„ÙŠØ© Ø¹Ù„Ù‰ Ø§Ù„Ø¥Ù†ØªØ§Ø¬ Ø§Ù„ØµÙ†Ø§Ø¹ÙŠ ÙÙŠ Ø§Ù„Ø³ÙˆØ¯Ø§Ù† Ø¯Ø±Ø§Ø³Ø© ØªØÙ„ÙŠÙ„ÙŠØ©: Ù…ØµÙ†Ø¹ Ø³ÙƒØ± ÙƒÙ†Ø§Ù†Ø© ( 2007- 2013). Gezira Journal Of Economic And Social Sciences, 5(1). Retrieved from http://37.60.236.48/index.php/gjess/article/view/274