APA (7th ed.) Citation

Blyton, E. (2015). The Secret Seven: Go Ahead, Secret Seven (1st.). Hodder Children's Books.

Chicago Style (17th ed.) Citation

Blyton, Enid. The Secret Seven: Go Ahead, Secret Seven. 1st. UK: Hodder Children's Books, 2015.

MLA (9th ed.) Citation

Blyton, Enid. The Secret Seven: Go Ahead, Secret Seven. 1st. Hodder Children's Books, 2015.

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