Klassen, J. (2021). The rock from the sky (First edition.). Candlewick Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKlassen, Jon. The Rock from the Sky. First edition. Somerville, Massachusetts: Candlewick Press, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKlassen, Jon. The Rock from the Sky. First edition. Candlewick Press, 2021.
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