Enid Blyton. (1943). The Mystery of the Secret Room. Hodder Children's Books.
Citazione stile Chigago Style (17a edizione)Enid Blyton. The Mystery of the Secret Room. New York: Hodder Children's Books, 1943.
Citatione MLA (9a ed.)Enid Blyton. The Mystery of the Secret Room. Hodder Children's Books, 1943.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.