O'Brian, P. (2025). 21: The final unfinished voyage of Jack Aubrey. W.W. Norton and Company, Inc..
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रO'Brian, Patrick. 21: The Final Unfinished Voyage of Jack Aubrey. New York, NY: W.W. Norton and Company, Inc., 2025.
एमएलए (8वां संस्करण) प्रशस्ति पत्रO'Brian, Patrick. 21: The Final Unfinished Voyage of Jack Aubrey. W.W. Norton and Company, Inc., 2025.
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