Blyton, E. (1942). The O'Sullivan Twins At St. Clare's (75th.). Hodder Children's Books.
Citace podle Chicago (17th ed.)Blyton, Enid. The O'Sullivan Twins At St. Clare's. 75th. London: Hodder Children's Books, 1942.
Citace podle MLA (9th ed.)Blyton, Enid. The O'Sullivan Twins At St. Clare's. 75th. Hodder Children's Books, 1942.
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