Jefkins, F. W. (1987). Public relations for your business. Mercury Books.
Lua i Stíl Chicago (17ú heag.)Jefkins, Frank William. Public Relations for Your Business. London: Mercury Books, 1987.
Lua MLA (9ú heag.)Jefkins, Frank William. Public Relations for Your Business. Mercury Books, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.