O'Briens,Derek. (2003). Essential Knowledge Quiz Book, 1 (NA.). Penguin books.
Citación estilo ChicagoO'Briens,Derek. Essential Knowledge Quiz Book, 1. NA. New Delhi: Penguin books, 2003.
Cita MLAO'Briens,Derek. Essential Knowledge Quiz Book, 1. NA. Penguin books, 2003.
Warning: These citations may not always be 100% accurate.