Patterson, J. (2007). The angel experiment (First paperback edition.). Little, Brown and Company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPatterson, James. The Angel Experiment. First paperback edition. New York: Little, Brown and Company, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPatterson, James. The Angel Experiment. First paperback edition. Little, Brown and Company, 2007.
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