Blyton, E. (1941). The Twins At St. Clare's (75th.). Hodder Children's Books.
Citazione stile Chigago Style (17a edizione)Blyton, Enid. The Twins At St. Clare's. 75th. London: Hodder Children's Books, 1941.
Citatione MLA (9a ed.)Blyton, Enid. The Twins At St. Clare's. 75th. Hodder Children's Books, 1941.
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