Blyton, E. (1941). The Twins At St. Clare's (75th.). Hodder Children's Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBlyton, Enid. The Twins At St. Clare's. 75th. London: Hodder Children's Books, 1941.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBlyton, Enid. The Twins At St. Clare's. 75th. Hodder Children's Books, 1941.
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