Schanzer, R. (2009). What Darwin saw: The journey that changed the world. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSchanzer, Rosalyn. What Darwin Saw: The Journey That Changed the World. Washington, D.C.: National Geographic, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSchanzer, Rosalyn. What Darwin Saw: The Journey That Changed the World. National Geographic, 2009.
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