MM. Business English Handbook. Linguaphone Institute Limited.
Lua i Stíl Chicago (17ú heag.)MM. Business English Handbook. Linguaphone Institute Limited.
Lua MLA (8ú heag.)MM. Business English Handbook. Linguaphone Institute Limited.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.