APA (7th ed.) Citation

Blyton, E. (1941). The Twins At St. Clare's (75th.). Hodder Children's Books.

Chicago Style (17th ed.) Citation

Blyton, Enid. The Twins At St. Clare's. 75th. London: Hodder Children's Books, 1941.

MLA (9th ed.) Citation

Blyton, Enid. The Twins At St. Clare's. 75th. Hodder Children's Books, 1941.

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