Agnone, J. V. (2016). What in the world?: A closer look. National Geographic Kids.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAgnone, Julie Vosburgh. What in the World?: A Closer Look. Washington, D.C.: National Geographic Kids, 2016.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAgnone, Julie Vosburgh. What in the World?: A Closer Look. National Geographic Kids, 2016.
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