Heder, T. (2017). Alfie: (the turtle that disappeared). Abrams Books for Young Readers.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHeder, Thyra. Alfie: (the Turtle That Disappeared). New York: Abrams Books for Young Readers, 2017.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHeder, Thyra. Alfie: (the Turtle That Disappeared). Abrams Books for Young Readers, 2017.
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