O'brien,Derek. (2003). Best Quizzes Of Derek O’Brien (NA.). Penguin Books.
Lua i Stíl Chicago (17ú heag.)O'brien,Derek. Best Quizzes Of Derek O’Brien. NA. New Delhi: Penguin Books, 2003.
Lua MLA (9ú heag.)O'brien,Derek. Best Quizzes Of Derek O’Brien. NA. Penguin Books, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.