Foster, J. (2003). Effective writting skils for public relations. Crest Publishing House.
Chicago-viite (17. p.)Foster, John. Effective Writting Skils for Public Relations. Crest Publishing House, 2003.
MLA-viite (8. p.)Foster, John. Effective Writting Skils for Public Relations. Crest Publishing House, 2003.
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