APA (7th ed.) Citation

Enid Blyton. (1997). Five on a treasure island. Hodder Children's Books.

Chicago Style (17th ed.) Citation

Enid Blyton. Five on a Treasure Island. London: Hodder Children's Books, 1997.

MLA (9th ed.) Citation

Enid Blyton. Five on a Treasure Island. Hodder Children's Books, 1997.

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