APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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