Albasher, Abubakr Abd el qader; Supervisor, - Mohamed Hassan Hafiz
CO- Supervisor, - Abd El hafiez Ali Hasaballah
(Sudan University Of Science And Technology, 2014-09-29)
Successful modern companies are those which seek to accomplish to a principal objective; that s the acquirement of customers loyalty.
The achievement of this objective depends on the role of the companies customers' ...