Osman, Fatimah Mustafa Ali; Satti, Lina Nasr Aldien Abu Zaid; Suleiman, Samia Babiker Ahmed; SUPERVISOR, Aimen Abdel Aziz Hussein Ali
(SUDAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, 2016-10-01)
This era (21 century) is characterized by revolution in communications and continues changes and improvement, so the companies with the participation of their products and marketing and the competition with other companies ...