Hillenbrand, W. (2023). The voice in the Hollow (First edition.). Holiday House.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHillenbrand, Will. The Voice in the Hollow. First edition. New York: Holiday House, 2023.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHillenbrand, Will. The Voice in the Hollow. First edition. Holiday House, 2023.
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