APA (7th ed.) Citation

Blyton, E. The Riddle of the rajah's ruby. Haper.

Chicago Style (17th ed.) Citation

Blyton, Enid. The Riddle of the Rajah's Ruby. London: Haper.

MLA (9th ed.) Citation

Blyton, Enid. The Riddle of the Rajah's Ruby. Haper.

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