Dyfyniad APA

Foster, J. (2008). Effective writing skills for public relations (4th ed.). Kogan Page.

Dyfyniad Arddull Chicago

Foster, John. Effective Writing Skills for Public Relations. 4th ed. London ; Philadelphia: Kogan Page, 2008.

Dyfyniad MLA

Foster, John. Effective Writing Skills for Public Relations. 4th ed. Kogan Page, 2008.

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