APA (7th ed.) Citation

Blyton, E. (2004). The mystery of the secret room ; 3. Dean.

Chicago Style (17th ed.) Citation

Blyton, Enid. The Mystery of the Secret Room ; 3. London: Dean, 2004.

MLA (9th ed.) Citation

Blyton, Enid. The Mystery of the Secret Room ; 3. Dean, 2004.

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