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1Academic Journal
المؤلفون: Wachira F. N, Gakure R. W, Orwa G
المساهمون: The Pennsylvania State University CiteSeerX Archives
Relation: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.674.930; http://thejournalofbusiness.org/index.php/site/article/viewFile/146/145/