Murphy, H. A. &. o. Effective Business Communication - 7th Ed. 2008.
Lua i Stíl Chicago (17ú heag.)Murphy, Herta A. & others. Effective Business Communication - 7th Ed. 2008.
Lua MLA (9ú heag.)Murphy, Herta A. & others. Effective Business Communication - 7th Ed. 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.