APA (7th ed.) Citation

Enid Blyton. (1951). The Mystery of the Vanished Prince. Egmont.

Chicago Style (17th ed.) Citation

Enid Blyton. The Mystery of the Vanished Prince. Great Britain: Egmont, 1951.

MLA (9th ed.) Citation

Enid Blyton. The Mystery of the Vanished Prince. Egmont, 1951.

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