Hartiy Peter. (2002). business Comunication. Routledge.
Lua i Stíl Chicago (17ú heag.)Hartiy Peter. Business Comunication. london: Routledge, 2002.
Lua MLA (9ú heag.)Hartiy Peter. Business Comunication. Routledge, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.