Kerley, B. (2013). The world is waiting for you. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKerley, Barbara. The World Is Waiting for You. Washington, DC: National Geographic, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKerley, Barbara. The World Is Waiting for You. National Geographic, 2013.
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