Enid Blyton. (1957). The Secret Seven Mystery: Secret Seven Mystery. Hodder Children's Books.
芝加哥风格引文Enid Blyton. The Secret Seven Mystery: Secret Seven Mystery. Great Britain: Hodder Children's Books, 1957.
MLA引文Enid Blyton. The Secret Seven Mystery: Secret Seven Mystery. Hodder Children's Books, 1957.
警告：这些引文格式不一定是100％准确.