Ø§Ø¯Ø±ÙŠØ³, Ø., & Ø¨Ø±ÙŠØ±, Ø. (2011). Ø¯ÙˆØ± Ø§Ø³ØªØ±Ø§ØªÙŠØ¬ÙŠØ§Øª Ø§Ù„Ù…Ø²ÙŠØ¬ Ø§Ù„ØªØ³ÙˆÙŠÙ‚ÙŠ ÙÙŠ Ø±ÙØ¹ ÙƒÙØ§Ø¡Ø© Ø§Ù„Ù…Ù†Ø´Ø¢Øª Ø§Ù„ØºØ°Ø§Ø¦ÙŠØ©. Gezira Journal Of Economic And Social Sciences, 2(1). Retrieved from http://37.60.236.48/index.php/gjess/article/view/528