APA (7th ed.) Citation

Blyton, E. (2016). The mystery of the spiteful letters. Hodder Children's Books.

Chicago Style (17th ed.) Citation

Blyton, Enid. The Mystery of the Spiteful Letters. London: Hodder Children's Books, 2016.

MLA (9th ed.) Citation

Blyton, Enid. The Mystery of the Spiteful Letters. Hodder Children's Books, 2016.