Cutlip, S. M. (2006). Effective public relations ed.9. Pearson.
Lua i Stíl Chicago (17ú heag.)Cutlip, Scott M. Effective Public Relations Ed.9. Pearson, 2006.
Lua MLA (8ú heag.)Cutlip, Scott M. Effective Public Relations Ed.9. Pearson, 2006.
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