Earle, S. A. (2009). The world is blue: How our fate and the ocean's are one. National Geographic.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEarle, Sylvia A. The World Is Blue: How Our Fate and the Ocean's Are One. Washington, D.C.: National Geographic, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रEarle, Sylvia A. The World Is Blue: How Our Fate and the Ocean's Are One. National Geographic, 2009.
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