Seitel, F. P. (2011). The Practice of Public Relations eleventh edition. Pearson.
Lua i Stíl Chicago (17ú heag.)Seitel, Fraser P. The Practice of Public Relations Eleventh Edition. Pearson, 2011.
Lua MLA (8ú heag.)Seitel, Fraser P. The Practice of Public Relations Eleventh Edition. Pearson, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.