Cita APA (7th ed.)

Enid Blyton. (1943). The Mystery of the Secret Room. Hodder Children's Books.

Cita Chicago (17th ed.)

Enid Blyton. The Mystery of the Secret Room. New York: Hodder Children's Books, 1943.

Cita MLA (9th ed.)

Enid Blyton. The Mystery of the Secret Room. Hodder Children's Books, 1943.