O'Briens,Derek. (2003). Essential Knowledge Quiz Book, 1 (NA.). Penguin books.
Chicagoスタイル(17版)引用形式O'Briens,Derek. Essential Knowledge Quiz Book, 1. NA. New Delhi: Penguin books, 2003.
MLA(9版)引用形式O'Briens,Derek. Essential Knowledge Quiz Book, 1. NA. Penguin books, 2003.
警告: この引用は必ずしも正確ではありません.