APA (7th ed.) Citation

Enid Blyton. (1950). The Secret Seven. Hodder Children's Book.

Chicago Style (17th ed.) Citation

Enid Blyton. The Secret Seven. London: Hodder Children's Book, 1950.

MLA (9th ed.) Citation

Enid Blyton. The Secret Seven. Hodder Children's Book, 1950.

Warning: These citations may not always be 100% accurate.