APA (7th ed.) Citation

Blyton, E. (2009). The mystery of the secret room. Dean.

Chicago Style (17th ed.) Citation

Blyton, Enid. The Mystery of the Secret Room. Great Britain: Dean, 2009.

MLA (9th ed.) Citation

Blyton, Enid. The Mystery of the Secret Room. Dean, 2009.

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