Enid Blyton. (1943). The Mystery of the Secret Room. Hodder Children's Books.
Chicago-čujuhus (17. p.)Enid Blyton. The Mystery of the Secret Room. New York: Hodder Children's Books, 1943.
MLA-čujuhus (9. p.)Enid Blyton. The Mystery of the Secret Room. Hodder Children's Books, 1943.
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