Broom, G. M., & Center, A. H. (2009). Cutlip & Center's effective public relations (10th ed.). Pearson.
Lua i Stíl Chicago (17ú heag.)Broom, Glen M., agus Allen H. Center. Cutlip & Center's Effective Public Relations. 10th ed. London: Pearson, 2009.
Lua MLA (9ú heag.)Broom, Glen M., agus Allen H. Center. Cutlip & Center's Effective Public Relations. 10th ed. Pearson, 2009.
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