Ø§Ù„Ø³ÙŠØ¯ Ø§Ù„Ø¹ÙˆØ¶, Ø., Ù…ØÙ…Ø¯, Ø., & Ø¹Ø«Ù…Ø§Ù†, Ø. 2018 Jun 1. ØªÙˆØ¬Ù‡Ø§Øª Ø§Ù„Ù…Ø±Ø£Ø© Ø§Ù„Ø³ÙˆØ¯Ø§Ù†ÙŠØ© Ù†ØÙˆ Ø§Ù„Ù…Ø´Ø§Ø±ÙƒØ© Ø§Ù„Ø³ÙŠØ§Ø³ÙŠØ© Ø¯Ø±Ø§Ø³Ø© Ø¥ØØµØ§Ø¦ÙŠØ© ØªØÙ„ÙŠÙ„ÙŠØ©) 2016Ù…). Gezira Journal of Economic and Social Sciences. [Online] 9:1