Cita APA (7th ed.)

O`Brien Derek. (2008). Derek`s Picks: The Best Quizzes of Derek O`Brien (NA.). Penguein Books.

Cita Chicago (17th ed.)

O`Brien Derek. Derek`s Picks: The Best Quizzes of Derek O`Brien. NA. New Delhi: Penguein Books, 2008.

Cita MLA (9th ed.)

O`Brien Derek. Derek`s Picks: The Best Quizzes of Derek O`Brien. NA. Penguein Books, 2008.