Crane, C. (2019). Simple machines. Children's Press, an Imprint of Scholastic Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCrane, Cody. Simple Machines. North Mankato, MN.: Children's Press, an Imprint of Scholastic Inc., 2019.
एमएलए (8वां संस्करण) प्रशस्ति पत्रCrane, Cody. Simple Machines. Children's Press, an Imprint of Scholastic Inc., 2019.
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