O' Brien,Derek. (2006). Penguin CRY Quiz Book 1 (NA.). Penguin books.
Lua i Stíl Chicago (17ú heag.)O' Brien,Derek. Penguin CRY Quiz Book 1. NA. New Delhi: Penguin books, 2006.
Lua MLA (9ú heag.)O' Brien,Derek. Penguin CRY Quiz Book 1. NA. Penguin books, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.