Enid Blyton. (1943). The Mystery of the Secret Room. Hodder Children's Books.
Lua i Stíl Chicago (17ú heag.)Enid Blyton. The Mystery of the Secret Room. New York: Hodder Children's Books, 1943.
Lua MLA (9ú heag.)Enid Blyton. The Mystery of the Secret Room. Hodder Children's Books, 1943.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.