O' BRIEN. (2000). CADBURY'S BOURNVITA BOOK.
Lua i Stíl Chicago (17ú heag.)O' BRIEN. CADBURY'S BOURNVITA BOOK. 2000.
Lua MLA (9ú heag.)O' BRIEN. CADBURY'S BOURNVITA BOOK. 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.