Cowell, C. (2018). Twice magic (First U.S. edition.). Little, Brown and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCowell, Cressida. Twice Magic. First U.S. edition. New York ; Boston: Little, Brown and Company, 2018.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCowell, Cressida. Twice Magic. First U.S. edition. Little, Brown and Company, 2018.
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