Foster, J. (2003). Effective writting skils for public relations. Crest Publishing House.
Chicago-referens (17:e uppl.)Foster, John. Effective Writting Skils for Public Relations. Crest Publishing House, 2003.
MLA-referens (8:e uppl.)Foster, John. Effective Writting Skils for Public Relations. Crest Publishing House, 2003.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.