Lua APA (7ú heag.)

O'Brien,Derek. (2005). Ultimate Quiz Challenge (NA.). Penguin Books.

Lua i Stíl Chicago (17ú heag.)

O'Brien,Derek. Ultimate Quiz Challenge. NA. New Delhi: Penguin Books, 2005.

Lua MLA (9ú heag.)

O'Brien,Derek. Ultimate Quiz Challenge. NA. Penguin Books, 2005.

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