Agnone, J. V. (2014). What in the world?: Fun-tastic photo puzzles for curious minds. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAgnone, Julie Vosburgh. What in the World?: Fun-tastic Photo Puzzles for Curious Minds. Washington, DC: National Geographic, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रAgnone, Julie Vosburgh. What in the World?: Fun-tastic Photo Puzzles for Curious Minds. National Geographic, 2014.
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