APA (7th ed.) Citation

Blyton, E. (1942). The O'Sullivan Twins At St. Clare's (75th.). Hodder Children's Books.

Chicago Style (17th ed.) Citation

Blyton, Enid. The O'Sullivan Twins At St. Clare's. 75th. London: Hodder Children's Books, 1942.

MLA (9th ed.) Citation

Blyton, Enid. The O'Sullivan Twins At St. Clare's. 75th. Hodder Children's Books, 1942.