Knowlton, N. (2010). Citizens of the sea: Wonderous creatures from the census of marine life. National Geographic Society.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKnowlton, Nancy. Citizens of the Sea: Wonderous Creatures from the Census of Marine Life. Washington, D.C.: National Geographic Society, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKnowlton, Nancy. Citizens of the Sea: Wonderous Creatures from the Census of Marine Life. National Geographic Society, 2010.
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