(1998). Africa review: The world of information : the economic & business report (21 ed.). Walden publishing ltd..
Chicago-viite (17. p.)Africa Review: The World of Information : The Economic & Business Report. 21 ed. United Kingdom: Walden publishing ltd., 1998.
MLA-viite (9. p.)Africa Review: The World of Information : The Economic & Business Report. 21 ed. Walden publishing ltd., 1998.
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